1257479252020 has 24 divisors (see below), whose sum is σ = 2640728563200. Its totient is φ = 502987484832.

The previous prime is 1257479251969. The next prime is 1257479252021. The reversal of 1257479252020 is 202529747521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257479252021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3478141 + ... + 3822619.

It is an arithmetic number, because the mean of its divisors is an integer number (110030356800).

Almost surely, 2^{1257479252020} is an apocalyptic number.

1257479252020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1257479252020 is an abundant number, since it is smaller than the sum of its proper divisors (1383249311180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257479252020 is a wasteful number, since it uses less digits than its factorization.

1257479252020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527007 (or 527005 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 1257479252020 in words is "one trillion, two hundred fifty-seven billion, four hundred seventy-nine million, two hundred fifty-two thousand, twenty".