142157840 has 40 divisors (see below), whose sum is σ = 360566208. Its totient is φ = 51693440.

The previous prime is 142157837. The next prime is 142157843. The reversal of 142157840 is 48751241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (142157837) and next prime (142157843).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 142157797 and 142157806.

It is not an unprimeable number, because it can be changed into a prime (142157843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79892 + ... + 81651.

Almost surely, 2^142157840 is an apocalyptic number.

142157840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142157840 is an abundant number, since it is smaller than the sum of its proper divisors (218408368).

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

142157840 is a wasteful number, since it uses less digits than its factorization.

142157840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161567 (or 161561 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 142157840 is about 11922.9962677173. The cubic root of 142157840 is about 521.9035753055.

The spelling of 142157840 in words is "one hundred forty-two million, one hundred fifty-seven thousand, eight hundred forty".