1557245001 has 16 divisors (see below), whose sum is σ = 2240162624. Its totient is φ = 956539584.

The previous prime is 1557244981. The next prime is 1557245003. The reversal of 1557245001 is 1005427551.

It is not a de Polignac number, because 1557245001 - 2¹⁰ = 1557243977 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 1557245001.

It is not an unprimeable number, because it can be changed into a prime (1557245003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15166 + ... + 57831.

It is an arithmetic number, because the mean of its divisors is an integer number (140010164).

Almost surely, 2^1557245001 is an apocalyptic number.

It is an amenable number.

1557245001 is a deficient number, since it is larger than the sum of its proper divisors (682917623).

1557245001 is a wasteful number, since it uses less digits than its factorization.

1557245001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73560.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 1557245001 is about 39461.9437052966. The cubic root of 1557245001 is about 1159.0948649137.

The spelling of 1557245001 in words is "one billion, five hundred fifty-seven million, two hundred forty-five thousand, one".