1251107056 has 10 divisors (see below), whose sum is σ = 2424019952. Its totient is φ = 625553520.

The previous prime is 1251107051. The next prime is 1251107093. The reversal of 1251107056 is 6507011521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251107051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39097080 + ... + 39097111.

Almost surely, 2^1251107056 is an apocalyptic number.

1251107056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1251107056 is a deficient number, since it is larger than the sum of its proper divisors (1172912896).

1251107056 is an equidigital number, since it uses as much as digits as its factorization.

1251107056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78194199 (or 78194193 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 1251107056 is about 35370.9917305127. The cubic root of 1251107056 is about 1077.5352618273.

Adding to 1251107056 its reverse (6507011521), we get a palindrome (7758118577).

The spelling of 1251107056 in words is "one billion, two hundred fifty-one million, one hundred seven thousand, fifty-six".