142667720 has 32 divisors (see below), whose sum is σ = 345696120. Its totient is φ = 52677120.

The previous prime is 142667699. The next prime is 142667743. The reversal of 142667720 is 27766241.

It can be written as a sum of positive squares in 4 ways, for example, as 43903876 + 98763844 = 6626^2 + 9938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136661 + ... + 137700.

Almost surely, 2^142667720 is an apocalyptic number.

142667720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142667720 is an abundant number, since it is smaller than the sum of its proper divisors (203028400).

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

142667720 is a wasteful number, since it uses less digits than its factorization.

142667720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274385 (or 274381 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 142667720 is about 11944.3593381981. The cubic root of 142667720 is about 522.5268043299.

The spelling of 142667720 in words is "one hundred forty-two million, six hundred sixty-seven thousand, seven hundred twenty".