1245870538357 has 4 divisors (see below), whose sum is σ = 1245893919616. Its totient is φ = 1245847157100.

The previous prime is 1245870538207. The next prime is 1245870538361. The reversal of 1245870538357 is 7538350785421.

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 a de Polignac number, because none of the positive numbers 2^k-1245870538357 is a prime.

It is a super-2 number, since 2×1245870538357² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245870538397) 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, 11610519 + ... + 11717332.

It is an arithmetic number, because the mean of its divisors is an integer number (311473479904).

Almost surely, 2^{1245870538357} is an apocalyptic number.

It is an amenable number.

1245870538357 is a deficient number, since it is larger than the sum of its proper divisors (23381259).

1245870538357 is an equidigital number, since it uses as much as digits as its factorization.

1245870538357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23381258.

The product of its (nonzero) digits is 28224000, while the sum is 58.

The spelling of 1245870538357 in words is "one trillion, two hundred forty-five billion, eight hundred seventy million, five hundred thirty-eight thousand, three hundred fifty-seven".