1520400254120 has 64 divisors (see below), whose sum is σ = 3832753507200. Its totient is φ = 537930305280.

The previous prime is 1520400254081. The next prime is 1520400254129. The reversal of 1520400254120 is 214520040251.

It is a self number, because there is not a number n which added to its sum of digits gives 1520400254120.

It is not an unprimeable number, because it can be changed into a prime (1520400254129) 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, 46679060 + ... + 46711619.

It is an arithmetic number, because the mean of its divisors is an integer number (59886773550).

Almost surely, 2^{1520400254120} is an apocalyptic number.

1520400254120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520400254120 is an abundant number, since it is smaller than the sum of its proper divisors (2312353253080).

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

1520400254120 is a wasteful number, since it uses less digits than its factorization.

1520400254120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93390738 (or 93390734 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 1520400254120 its reverse (214520040251), we get a palindrome (1734920294371).

The spelling of 1520400254120 in words is "one trillion, five hundred twenty billion, four hundred million, two hundred fifty-four thousand, one hundred twenty".