142972155 has 64 divisors (see below), whose sum is σ = 265420800. Its totient is φ = 72938880.

The previous prime is 142972153. The next prime is 142972177. The reversal of 142972155 is 551279241.

142972155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142972155 - 2¹ = 142972153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142972153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 531361 + ... + 531629.

It is an arithmetic number, because the mean of its divisors is an integer number (4147200).

Almost surely, 2^142972155 is an apocalyptic number.

142972155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142972155 is a deficient number, since it is larger than the sum of its proper divisors (122448645).

142972155 is a wasteful number, since it uses less digits than its factorization.

142972155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 435 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 142972155 is about 11957.0964284813. The cubic root of 142972155 is about 522.8982091406.

The spelling of 142972155 in words is "one hundred forty-two million, nine hundred seventy-two thousand, one hundred fifty-five".