126981980 has 12 divisors (see below), whose sum is σ = 266662200. Its totient is φ = 50792784.

The previous prime is 126981979. The next prime is 126981991. The reversal of 126981980 is 89189621.

It is a super-2 number, since 2×126981980² = 32248846489440800, 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 3 ways as a sum of consecutive naturals, for example, 3174530 + ... + 3174569.

It is an arithmetic number, because the mean of its divisors is an integer number (22221850).

Almost surely, 2^126981980 is an apocalyptic number.

126981980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126981980 is an abundant number, since it is smaller than the sum of its proper divisors (139680220).

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

126981980 is a wasteful number, since it uses less digits than its factorization.

126981980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349108 (or 6349106 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 126981980 is about 11268.6281330071. The cubic root of 126981980 is about 502.6287946554.

The spelling of 126981980 in words is "one hundred twenty-six million, nine hundred eighty-one thousand, nine hundred eighty".