126945289 has 9 divisors (see below), whose sum is σ = 134204583. Its totient is φ = 120061152.

The previous prime is 126945283. The next prime is 126945319. The reversal of 126945289 is 982549621.

The square root of 126945289 is 11267.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 78057225 + 48888064 = 8835^2 + 6992^2 .

It is not a de Polignac number, because 126945289 - 2¹⁵ = 126912521 is a prime.

It is a super-2 number, since 2×126945289² = 32230212798587042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126945283) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 213777 + ... + 214369.

Almost surely, 2^126945289 is an apocalyptic number.

126945289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

126945289 is the 11267-th square number.

126945289 is the 5634-th centered octagonal number.

It is an amenable number.

126945289 is a deficient number, since it is larger than the sum of its proper divisors (7259294).

126945289 is an frugal number, since it uses more digits than its factorization.

126945289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 612 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The cubic root of 126945289 is about 502.5803790465.

The spelling of 126945289 in words is "one hundred twenty-six million, nine hundred forty-five thousand, two hundred eighty-nine".