1257135051 has 8 divisors (see below), whose sum is σ = 1721482384. Its totient is φ = 815438880.

The previous prime is 1257135013. The next prime is 1257135053. The reversal of 1257135051 is 1505317521.

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

It is not a de Polignac number, because 1257135051 - 2⁹ = 1257134539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257135053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5662660 + ... + 5662881.

It is an arithmetic number, because the mean of its divisors is an integer number (215185298).

Almost surely, 2^1257135051 is an apocalyptic number.

1257135051 is a deficient number, since it is larger than the sum of its proper divisors (464347333).

1257135051 is a wasteful number, since it uses less digits than its factorization.

1257135051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11325581.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 1257135051 is about 35456.1003354853. The cubic root of 1257135051 is about 1079.2630577871.

The spelling of 1257135051 in words is "one billion, two hundred fifty-seven million, one hundred thirty-five thousand, fifty-one".