1131406245 has 16 divisors (see below), whose sum is σ = 2011389120. Its totient is φ = 603416592.

The previous prime is 1131406217. The next prime is 1131406249. The reversal of 1131406245 is 5426041311.

It is a happy number.

1131406245 is a `hidden beast` number, since 1 + 1 + 31 + 4 + 0 + 624 + 5 = 666.

It is not a de Polignac number, because 1131406245 - 2⁹ = 1131405733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131406249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4190259 + ... + 4190528.

It is an arithmetic number, because the mean of its divisors is an integer number (125711820).

Almost surely, 2^1131406245 is an apocalyptic number.

1131406245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131406245 is a deficient number, since it is larger than the sum of its proper divisors (879982875).

1131406245 is an equidigital number, since it uses as much as digits as its factorization.

1131406245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8380801 (or 8380795 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1131406245 is about 33636.3827573656. The cubic root of 1131406245 is about 1042.0123281931.

Adding to 1131406245 its reverse (5426041311), we get a palindrome (6557447556).

The spelling of 1131406245 in words is "one billion, one hundred thirty-one million, four hundred six thousand, two hundred forty-five".