126651331 has 2 divisors, whose sum is σ = 126651332. Its totient is φ = 126651330.

The previous prime is 126651313. The next prime is 126651353. The reversal of 126651331 is 133156621.

Together with previous prime (126651313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126651331 - 2⁹ = 126650819 is a prime.

It is a super-2 number, since 2×126651331² = 32081119288143122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126651331.

It is not a weakly prime, because it can be changed into another prime (126651391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63325665 + 63325666.

It is an arithmetic number, because the mean of its divisors is an integer number (63325666).

Almost surely, 2^126651331 is an apocalyptic number.

126651331 is a deficient number, since it is larger than the sum of its proper divisors (1).

126651331 is an equidigital number, since it uses as much as digits as its factorization.

126651331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 126651331 is about 11253.9473519295. The cubic root of 126651331 is about 502.1921495812.

The spelling of 126651331 in words is "one hundred twenty-six million, six hundred fifty-one thousand, three hundred thirty-one".