126990361 has 9 divisors (see below), whose sum is σ = 129859093. Its totient is φ = 124184380.

The previous prime is 126990343. The next prime is 126990377. The reversal of 126990361 is 163099621.

126990361 = 1438² + 1439² + ... + 1496².

The square root of 126990361 is 11269.

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

It is not a de Polignac number, because 126990361 - 2⁷ = 126990233 is a prime.

It is a super-2 number, since 2×126990361² = 32253103573820642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126990361.

It is not an unprimeable number, because it can be changed into a prime (126990301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 664776 + ... + 664966.

Almost surely, 2^126990361 is an apocalyptic number.

126990361 is the 11269-th square number.

126990361 is the 5635-th centered octagonal number.

It is an amenable number.

126990361 is a deficient number, since it is larger than the sum of its proper divisors (2868732).

126990361 is an frugal number, since it uses more digits than its factorization.

126990361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The cubic root of 126990361 is about 502.6398524954.

The spelling of 126990361 in words is "one hundred twenty-six million, nine hundred ninety thousand, three hundred sixty-one".