126992020 has 24 divisors (see below), whose sum is σ = 270442368. Its totient is φ = 50080800.

The previous prime is 126991961. The next prime is 126992051. The reversal of 126992020 is 20299621.

126992020 = 160² + 161² + ... + 727².

It is a super-2 number, since 2×126992020² = 32253946287360800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43296 + ... + 46135.

It is an arithmetic number, because the mean of its divisors is an integer number (11268432).

Almost surely, 2^126992020 is an apocalyptic number.

126992020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126992020 is an abundant number, since it is smaller than the sum of its proper divisors (143450348).

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

126992020 is a wasteful number, since it uses less digits than its factorization.

126992020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89511 (or 89509 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 126992020 is about 11269.0736087755. The cubic root of 126992020 is about 502.6420413121.

The spelling of 126992020 in words is "one hundred twenty-six million, nine hundred ninety-two thousand, twenty".