1260157657 has 32 divisors (see below), whose sum is σ = 1512096768. Its totient is φ = 1036800000.

The previous prime is 1260157651. The next prime is 1260157663. The reversal of 1260157657 is 7567510621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1260157651) and next prime (1260157663).

It is a cyclic number.

It is not a de Polignac number, because 1260157657 - 2⁷ = 1260157529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260157651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1048657 + ... + 1049857.

It is an arithmetic number, because the mean of its divisors is an integer number (47253024).

Almost surely, 2^1260157657 is an apocalyptic number.

1260157657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1260157657 is a deficient number, since it is larger than the sum of its proper divisors (251939111).

1260157657 is a wasteful number, since it uses less digits than its factorization.

1260157657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 1260157657 is about 35498.6993705403. The cubic root of 1260157657 is about 1080.1273446662.

The spelling of 1260157657 in words is "one billion, two hundred sixty million, one hundred fifty-seven thousand, six hundred fifty-seven".