142156620 has 60 divisors (see below), whose sum is σ = 445955664. Its totient is φ = 37908000.

The previous prime is 142156603. The next prime is 142156621. The reversal of 142156620 is 26651241.

142156620 is a `hidden beast` number, since 14 + 21 + 5 + 6 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (142156621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42256 + ... + 45495.

Almost surely, 2^142156620 is an apocalyptic number.

142156620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142156620 is an abundant number, since it is smaller than the sum of its proper divisors (303799044).

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

142156620 is a wasteful number, since it uses less digits than its factorization.

142156620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87772 (or 87761 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 142156620 is about 11922.9451059711. The cubic root of 142156620 is about 521.9020823074.

The spelling of 142156620 in words is "one hundred forty-two million, one hundred fifty-six thousand, six hundred twenty".