126459981 has 16 divisors (see below), whose sum is σ = 193809600. Its totient is φ = 81399024.

The previous prime is 126459959. The next prime is 126459989. The reversal of 126459981 is 189954621.

It is not a de Polignac number, because 126459981 - 2⁶ = 126459917 is a prime.

It is a super-2 number, since 2×126459981² = 31984253589040722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126459989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79971 + ... + 81536.

It is an arithmetic number, because the mean of its divisors is an integer number (12113100).

Almost surely, 2^126459981 is an apocalyptic number.

It is an amenable number.

126459981 is a deficient number, since it is larger than the sum of its proper divisors (67349619).

126459981 is a wasteful number, since it uses less digits than its factorization.

126459981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161545 (or 161539 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 126459981 is about 11245.4426769247. The cubic root of 126459981 is about 501.9391113062.

The spelling of 126459981 in words is "one hundred twenty-six million, four hundred fifty-nine thousand, nine hundred eighty-one".