126659990 has 16 divisors (see below), whose sum is σ = 228133152. Its totient is φ = 50631744.

The previous prime is 126659987. The next prime is 126659993. The reversal of 126659990 is 99956621.

It is an interprime number because it is at equal distance from previous prime (126659987) and next prime (126659993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126659993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18407 + ... + 24333.

It is an arithmetic number, because the mean of its divisors is an integer number (14258322).

Almost surely, 2^126659990 is an apocalyptic number.

126659990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126659990 is a deficient number, since it is larger than the sum of its proper divisors (101473162).

126659990 is a wasteful number, since it uses less digits than its factorization.

126659990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 126659990 is about 11254.3320548134. The cubic root of 126659990 is about 502.2035940792.

The spelling of 126659990 in words is "one hundred twenty-six million, six hundred fifty-nine thousand, nine hundred ninety".