126991322 has 16 divisors (see below), whose sum is σ = 193275720. Its totient is φ = 62572608.

The previous prime is 126991301. The next prime is 126991351. The reversal of 126991322 is 223199621.

It can be written as a sum of positive squares in 4 ways, for example, as 124523281 + 2468041 = 11159^2 + 1571^2 .

It is a super-2 number, since 2×126991322² = 32253591726615368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41468 + ... + 44424.

Almost surely, 2^126991322 is an apocalyptic number.

126991322 is a deficient number, since it is larger than the sum of its proper divisors (66284398).

126991322 is a wasteful number, since it uses less digits than its factorization.

126991322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265.

The product of its digits is 11664, while the sum is 35.

The square root of 126991322 is about 11269.0426390177. The cubic root of 126991322 is about 502.6411204018.

The spelling of 126991322 in words is "one hundred twenty-six million, nine hundred ninety-one thousand, three hundred twenty-two".