126118639 has 2 divisors, whose sum is σ = 126118640. Its totient is φ = 126118638.

The previous prime is 126118621. The next prime is 126118679. The reversal of 126118639 is 936811621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126118639 - 2⁷ = 126118511 is a prime.

It is a super-2 number, since 2×126118639² = 31811822206424642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126118598 and 126118607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126118679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63059319 + 63059320.

It is an arithmetic number, because the mean of its divisors is an integer number (63059320).

Almost surely, 2^126118639 is an apocalyptic number.

126118639 is a deficient number, since it is larger than the sum of its proper divisors (1).

126118639 is an equidigital number, since it uses as much as digits as its factorization.

126118639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 126118639 is about 11230.2555180192. The cubic root of 126118639 is about 501.4870914002.

It can be divided in two parts, 1261 and 18639, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 126118639 in words is "one hundred twenty-six million, one hundred eighteen thousand, six hundred thirty-nine".