202142128 has 20 divisors (see below), whose sum is σ = 392711968. Its totient is φ = 100797120.

The previous prime is 202142123. The next prime is 202142131. The reversal of 202142128 is 821241202.

It is a super-2 number, since 2×202142128² = 81722879824736768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202142099 and 202142108.

It is not an unprimeable number, because it can be changed into a prime (202142123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10968 + ... + 22903.

Almost surely, 2^202142128 is an apocalyptic number.

It is an amenable number.

202142128 is a deficient number, since it is larger than the sum of its proper divisors (190569840).

202142128 is a wasteful number, since it uses less digits than its factorization.

202142128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34252 (or 34246 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 202142128 is about 14217.6695699401. The cubic root of 202142128 is about 586.8840109528.

The spelling of 202142128 in words is "two hundred two million, one hundred forty-two thousand, one hundred twenty-eight".