142902981 has 64 divisors (see below), whose sum is σ = 239904000. Its totient is φ = 83462400.

The previous prime is 142902943. The next prime is 142903043. The reversal of 142902981 is 189209241.

It is not a de Polignac number, because 142902981 - 2¹³ = 142894789 is a prime.

It is a super-2 number, since 2×142902981² = 40842523957372722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142902911) 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, 1028010 + ... + 1028148.

It is an arithmetic number, because the mean of its divisors is an integer number (3748500).

Almost surely, 2^142902981 is an apocalyptic number.

It is an amenable number.

142902981 is a deficient number, since it is larger than the sum of its proper divisors (97001019).

142902981 is a wasteful number, since it uses less digits than its factorization.

142902981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 142902981 is about 11954.2034866402. The cubic root of 142902981 is about 522.8138645216.

It can be divided in two parts, 14290 and 2981, that added together give a palindrome (17271).

The spelling of 142902981 in words is "one hundred forty-two million, nine hundred two thousand, nine hundred eighty-one".