126732457 has 4 divisors (see below), whose sum is σ = 126795780. Its totient is φ = 126669136.

The previous prime is 126732439. The next prime is 126732491. The reversal of 126732457 is 754237621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754237621 = 4861 ⋅155161.

It can be written as a sum of positive squares in 2 ways, for example, as 16818201 + 109914256 = 4101^2 + 10484^2 .

It is a cyclic number.

It is not a de Polignac number, because 126732457 - 2⁷ = 126732329 is a prime.

It is a super-2 number, since 2×126732457² = 32122231314513698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126732757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28558 + ... + 32695.

It is an arithmetic number, because the mean of its divisors is an integer number (31698945).

Almost surely, 2^126732457 is an apocalyptic number.

It is an amenable number.

126732457 is a deficient number, since it is larger than the sum of its proper divisors (63323).

126732457 is an equidigital number, since it uses as much as digits as its factorization.

126732457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63322.

The product of its digits is 70560, while the sum is 37.

The square root of 126732457 is about 11257.5511102548. The cubic root of 126732457 is about 502.2993524146.

The spelling of 126732457 in words is "one hundred twenty-six million, seven hundred thirty-two thousand, four hundred fifty-seven".