142522991 has 4 divisors (see below), whose sum is σ = 153486312. Its totient is φ = 131559672.

The previous prime is 142522979. The next prime is 142523033. The reversal of 142522991 is 199225241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142522991 - 2¹⁴ = 142506607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142522921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5481641 + ... + 5481666.

It is an arithmetic number, because the mean of its divisors is an integer number (38371578).

Almost surely, 2^142522991 is an apocalyptic number.

142522991 is a deficient number, since it is larger than the sum of its proper divisors (10963321).

142522991 is a wasteful number, since it uses less digits than its factorization.

142522991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10963320.

The product of its digits is 12960, while the sum is 35.

The square root of 142522991 is about 11938.2993344948. The cubic root of 142522991 is about 522.3500524369.

The spelling of 142522991 in words is "one hundred forty-two million, five hundred twenty-two thousand, nine hundred ninety-one".