126905489 has 2 divisors, whose sum is σ = 126905490. Its totient is φ = 126905488.

The previous prime is 126905477. The next prime is 126905507. The reversal of 126905489 is 984509621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123988225 + 2917264 = 11135^2 + 1708^2 .

It is a cyclic number.

It is not a de Polignac number, because 126905489 - 2⁴ = 126905473 is a prime.

It is a super-2 number, since 2×126905489² = 32210006276658242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126905419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63452744 + 63452745.

It is an arithmetic number, because the mean of its divisors is an integer number (63452745).

Almost surely, 2^126905489 is an apocalyptic number.

It is an amenable number.

126905489 is a deficient number, since it is larger than the sum of its proper divisors (1).

126905489 is an equidigital number, since it uses as much as digits as its factorization.

126905489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 126905489 is about 11265.2336416073. The cubic root of 126905489 is about 502.5278504073.

The spelling of 126905489 in words is "one hundred twenty-six million, nine hundred five thousand, four hundred eighty-nine".