1121501400 has 48 divisors (see below), whose sum is σ = 3476656200. Its totient is φ = 299066880.

The previous prime is 1121501387. The next prime is 1121501401. The reversal of 1121501400 is 41051211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1121501400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121501401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933985 + ... + 935184.

Almost surely, 2^1121501400 is an apocalyptic number.

1121501400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121501400 is an abundant number, since it is smaller than the sum of its proper divisors (2355154800).

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

1121501400 is a wasteful number, since it uses less digits than its factorization.

1121501400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869188 (or 1869179 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1121501400 is about 33488.8250017823. The cubic root of 1121501400 is about 1038.9626614194.

Adding to 1121501400 its reverse (41051211), we get a palindrome (1162552611).

The spelling of 1121501400 in words is "one billion, one hundred twenty-one million, five hundred one thousand, four hundred".