1121231457 has 16 divisors (see below), whose sum is σ = 1689240000. Its totient is φ = 734817312.

The previous prime is 1121231453. The next prime is 1121231473. The reversal of 1121231457 is 7541321211.

It is not a de Polignac number, because 1121231457 - 2² = 1121231453 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1121231457.

It is not an unprimeable number, because it can be changed into a prime (1121231453) 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, 350332 + ... + 353517.

It is an arithmetic number, because the mean of its divisors is an integer number (105577500).

Almost surely, 2^1121231457 is an apocalyptic number.

It is an amenable number.

1121231457 is a deficient number, since it is larger than the sum of its proper divisors (568008543).

1121231457 is an equidigital number, since it uses as much as digits as its factorization.

1121231457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703917 (or 703911 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1121231457 is about 33484.7944147788. The cubic root of 1121231457 is about 1038.8792960300.

Adding to 1121231457 its reverse (7541321211), we get a palindrome (8662552668).

The spelling of 1121231457 in words is "one billion, one hundred twenty-one million, two hundred thirty-one thousand, four hundred fifty-seven".