1257472256213 has 4 divisors (see below), whose sum is σ = 1323655006560. Its totient is φ = 1191289505868.

The previous prime is 1257472256113. The next prime is 1257472256291. The reversal of 1257472256213 is 3126522747521.

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 1257472256213 - 2¹² = 1257472252117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257472256113) 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, 33091375145 + ... + 33091375182.

It is an arithmetic number, because the mean of its divisors is an integer number (330913751640).

Almost surely, 2^{1257472256213} is an apocalyptic number.

It is an amenable number.

1257472256213 is a deficient number, since it is larger than the sum of its proper divisors (66182750347).

1257472256213 is an equidigital number, since it uses as much as digits as its factorization.

1257472256213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66182750346.

The product of its digits is 1411200, while the sum is 47.

The spelling of 1257472256213 in words is "one trillion, two hundred fifty-seven billion, four hundred seventy-two million, two hundred fifty-six thousand, two hundred thirteen".