142157930 has 8 divisors (see below), whose sum is σ = 255884292. Its totient is φ = 56863168.

The previous prime is 142157891. The next prime is 142157989. The reversal of 142157930 is 39751241.

It is a Cunningham number, because it is equal to 11923²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 142157929 + 1 = 11923^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7107887 + ... + 7107906.

Almost surely, 2^142157930 is an apocalyptic number.

142157930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142157930 is a deficient number, since it is larger than the sum of its proper divisors (113726362).

142157930 is a wasteful number, since it uses less digits than its factorization.

142157930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14215800.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 142157930 is about 11923.0000419358. Note that the first 4 decimals coincide. The cubic root of 142157930 is about 521.9036854444.

The spelling of 142157930 in words is "one hundred forty-two million, one hundred fifty-seven thousand, nine hundred thirty".