1540131425 has 24 divisors (see below), whose sum is σ = 2185723200. Its totient is φ = 1054572480.

The previous prime is 1540131409. The next prime is 1540131427. The reversal of 1540131425 is 5241310451.

It is not a de Polignac number, because 1540131425 - 2⁴ = 1540131409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1540131394 and 1540131403.

It is not an unprimeable number, because it can be changed into a prime (1540131427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123371 + ... + 135279.

It is an arithmetic number, because the mean of its divisors is an integer number (91071800).

Almost surely, 2^1540131425 is an apocalyptic number.

It is an amenable number.

1540131425 is a deficient number, since it is larger than the sum of its proper divisors (645591775).

1540131425 is a wasteful number, since it uses less digits than its factorization.

1540131425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12665 (or 12660 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1540131425 is about 39244.5082145260. The cubic root of 1540131425 is about 1154.8331999277.

Adding to 1540131425 its reverse (5241310451), we get a palindrome (6781441876).

The spelling of 1540131425 in words is "one billion, five hundred forty million, one hundred thirty-one thousand, four hundred twenty-five".