142021512 has 40 divisors (see below), whose sum is σ = 397793550. Its totient is φ = 47340288.

The previous prime is 142021493. The next prime is 142021531. The reversal of 142021512 is 215120241.

It is an interprime number because it is at equal distance from previous prime (142021493) and next prime (142021531).

It can be written as a sum of positive squares in only one way, i.e., 96943716 + 45077796 = 9846^2 + 6714^2 .

It is a super-2 number, since 2×142021512² = 40340219741532288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 108937 + ... + 110232.

Almost surely, 2^142021512 is an apocalyptic number.

142021512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

142021512 is an abundant number, since it is smaller than the sum of its proper divisors (255772038).

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

142021512 is a wasteful number, since it uses less digits than its factorization.

142021512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219187 (or 219174 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 142021512 is about 11917.2778770993. The cubic root of 142021512 is about 521.7366884451.

Adding to 142021512 its reverse (215120241), we get a palindrome (357141753).

The spelling of 142021512 in words is "one hundred forty-two million, twenty-one thousand, five hundred twelve".