142692640 has 24 divisors (see below), whose sum is σ = 337111740. Its totient is φ = 57076992.

The previous prime is 142692637. The next prime is 142692661. The reversal of 142692640 is 46296241.

It can be written as a sum of positive squares in 2 ways, for example, as 134467216 + 8225424 = 11596^2 + 2868^2 .

It is a super-2 number, since 2×142692640² = 40722379020339200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142692596 and 142692605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445755 + ... + 446074.

Almost surely, 2^142692640 is an apocalyptic number.

142692640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142692640 is an abundant number, since it is smaller than the sum of its proper divisors (194419100).

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

142692640 is an equidigital number, since it uses as much as digits as its factorization.

142692640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891844 (or 891836 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 142692640 is about 11945.4024628725. The cubic root of 142692640 is about 522.5572260910.

The spelling of 142692640 in words is "one hundred forty-two million, six hundred ninety-two thousand, six hundred forty".