1257229528371 has 6 divisors (see below), whose sum is σ = 1815998207660. Its totient is φ = 838153018908.

The previous prime is 1257229528339. The next prime is 1257229528441. The reversal of 1257229528371 is 1738259227521.

It is a happy number.

1257229528371 is a `hidden beast` number, since 1 + 2 + 5 + 7 + 2 + 295 + 283 + 71 = 666.

It is not a de Polignac number, because 1257229528371 - 2⁵ = 1257229528339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257229528271) 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 5 ways as a sum of consecutive naturals, for example, 69846084901 + ... + 69846084918.

Almost surely, 2^{1257229528371} is an apocalyptic number.

1257229528371 is a deficient number, since it is larger than the sum of its proper divisors (558768679289).

1257229528371 is a wasteful number, since it uses less digits than its factorization.

1257229528371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139692169825 (or 139692169822 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 1257229528371 in words is "one trillion, two hundred fifty-seven billion, two hundred twenty-nine million, five hundred twenty-eight thousand, three hundred seventy-one".