1257970001 has 4 divisors (see below), whose sum is σ = 1259091312. Its totient is φ = 1256848692.

The previous prime is 1257969997. The next prime is 1257970013. The reversal of 1257970001 is 1000797521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1257970001 - 2² = 1257969997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1257970001.

It is not an unprimeable number, because it can be changed into a prime (1257970061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558971 + ... + 561216.

It is an arithmetic number, because the mean of its divisors is an integer number (314772828).

Almost surely, 2^1257970001 is an apocalyptic number.

It is an amenable number.

1257970001 is a deficient number, since it is larger than the sum of its proper divisors (1121311).

1257970001 is a wasteful number, since it uses less digits than its factorization.

1257970001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121310.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 1257970001 is about 35467.8728006065. The cubic root of 1257970001 is about 1079.5019425598.

The spelling of 1257970001 in words is "one billion, two hundred fifty-seven million, nine hundred seventy thousand, one".