1540129025 has 24 divisors (see below), whose sum is σ = 2025656064. Its totient is φ = 1157587200.

The previous prime is 1540129007. The next prime is 1540129039. The reversal of 1540129025 is 5209210451.

It is not a de Polignac number, because 1540129025 - 2⁸ = 1540128769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265304 + ... + 271046.

It is an arithmetic number, because the mean of its divisors is an integer number (84402336).

Almost surely, 2^1540129025 is an apocalyptic number.

It is an amenable number.

1540129025 is a deficient number, since it is larger than the sum of its proper divisors (485527039).

1540129025 is a wasteful number, since it uses less digits than its factorization.

1540129025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401 (or 6396 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1540129025 is about 39244.4776369873. The cubic root of 1540129025 is about 1154.8326000652.

Adding to 1540129025 its reverse (5209210451), we get a palindrome (6749339476).

The spelling of 1540129025 in words is "one billion, five hundred forty million, one hundred twenty-nine thousand, twenty-five".