1131004434 has 64 divisors (see below), whose sum is σ = 2733760512. Its totient is φ = 305078400.

The previous prime is 1131004429. The next prime is 1131004439. The reversal of 1131004434 is 4344001311.

It is an interprime number because it is at equal distance from previous prime (1131004429) and next prime (1131004439).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1131004434.

It is not an unprimeable number, because it can be changed into a prime (1131004439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42789 + ... + 63975.

It is an arithmetic number, because the mean of its divisors is an integer number (42715008).

Almost surely, 2^1131004434 is an apocalyptic number.

1131004434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131004434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1366880256).

1131004434 is an abundant number, since it is smaller than the sum of its proper divisors (1602756078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131004434 is a wasteful number, since it uses less digits than its factorization.

1131004434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21271.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1131004434 is about 33630.4093641454. The cubic root of 1131004434 is about 1041.8889591285. Note that the first 3 decimals are identical.

Adding to 1131004434 its reverse (4344001311), we get a palindrome (5475005745).

The spelling of 1131004434 in words is "one billion, one hundred thirty-one million, four thousand, four hundred thirty-four".