1257035313 has 8 divisors (see below), whose sum is σ = 1677088800. Its totient is φ = 837502688.

The previous prime is 1257035309. The next prime is 1257035323. The reversal of 1257035313 is 3135307521.

1257035313 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1257035313 - 2² = 1257035309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1257035323) 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, 124548 + ... + 134261.

It is an arithmetic number, because the mean of its divisors is an integer number (209636100).

Almost surely, 2^1257035313 is an apocalyptic number.

It is an amenable number.

1257035313 is a deficient number, since it is larger than the sum of its proper divisors (420053487).

1257035313 is a wasteful number, since it uses less digits than its factorization.

1257035313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260431.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 1257035313 is about 35454.6938077316. The cubic root of 1257035313 is about 1079.2345150076.

The spelling of 1257035313 in words is "one billion, two hundred fifty-seven million, thirty-five thousand, three hundred thirteen".