1542912978 has 16 divisors (see below), whose sum is σ = 3089943936. Its totient is φ = 513618000.

The previous prime is 1542912923. The next prime is 1542913003. The reversal of 1542912978 is 8792192451.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166701 + ... + 175712.

It is an arithmetic number, because the mean of its divisors is an integer number (193121496).

Almost surely, 2^1542912978 is an apocalyptic number.

1542912978 is an abundant number, since it is smaller than the sum of its proper divisors (1547030958).

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

1542912978 is a wasteful number, since it uses less digits than its factorization.

1542912978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343169.

The product of its digits is 362880, while the sum is 48.

The square root of 1542912978 is about 39279.9309826278. The cubic root of 1542912978 is about 1155.5280103018.

The spelling of 1542912978 in words is "one billion, five hundred forty-two million, nine hundred twelve thousand, nine hundred seventy-eight".