142521908677 has 4 divisors (see below), whose sum is σ = 143783164620. Its totient is φ = 141260652736.

The previous prime is 142521908663. The next prime is 142521908681. The reversal of 142521908677 is 776809125241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2626460001 + 139895448676 = 51249^2 + 374026^2 .

It is not a de Polignac number, because 142521908677 - 2³⁵ = 108162170309 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 (142521908687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630627802 + ... + 630628027.

It is an arithmetic number, because the mean of its divisors is an integer number (35945791155).

Almost surely, 2^142521908677 is an apocalyptic number.

It is an amenable number.

142521908677 is a deficient number, since it is larger than the sum of its proper divisors (1261255943).

142521908677 is a wasteful number, since it uses less digits than its factorization.

142521908677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261255942.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 142521908677 in words is "one hundred forty-two billion, five hundred twenty-one million, nine hundred eight thousand, six hundred seventy-seven".