1539142540 has 24 divisors (see below), whose sum is σ = 3480830640. Its totient is φ = 568298688.

The previous prime is 1539142537. The next prime is 1539142571. The reversal of 1539142540 is 452419351.

It is a junction number, because it is equal to n+sod(n) for n = 1539142496 and 1539142505.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2959630 + ... + 2960149.

It is an arithmetic number, because the mean of its divisors is an integer number (145034610).

Almost surely, 2^1539142540 is an apocalyptic number.

1539142540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1539142540 is an abundant number, since it is smaller than the sum of its proper divisors (1941688100).

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

1539142540 is a wasteful number, since it uses less digits than its factorization.

1539142540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919801 (or 5919799 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1539142540 is about 39231.9071675084. The cubic root of 1539142540 is about 1154.5859825550.

The spelling of 1539142540 in words is "one billion, five hundred thirty-nine million, one hundred forty-two thousand, five hundred forty".