1268956157 has 8 divisors (see below), whose sum is σ = 1477598976. Its totient is φ = 1067154192.

The previous prime is 1268956151. The next prime is 1268956229. The reversal of 1268956157 is 7516598621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1268956157 - 2⁶ = 1268956093 is a prime.

It is a super-2 number, since 2×1268956157² = 3220499456776417298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268956151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709813 + ... + 1710554.

It is an arithmetic number, because the mean of its divisors is an integer number (184699872).

Almost surely, 2^1268956157 is an apocalyptic number.

It is an amenable number.

1268956157 is a deficient number, since it is larger than the sum of its proper divisors (208642819).

1268956157 is an equidigital number, since it uses as much as digits as its factorization.

1268956157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420427.

The product of its digits is 907200, while the sum is 50.

The square root of 1268956157 is about 35622.4108813539. The cubic root of 1268956157 is about 1082.6353556741.

The spelling of 1268956157 in words is "one billion, two hundred sixty-eight million, nine hundred fifty-six thousand, one hundred fifty-seven".