126651438 has 20 divisors (see below), whose sum is σ = 283793400. Its totient is φ = 42217092.

The previous prime is 126651403. The next prime is 126651449. The reversal of 126651438 is 834156621.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 390738 + ... + 391061.

It is an arithmetic number, because the mean of its divisors is an integer number (14189670).

Almost surely, 2^126651438 is an apocalyptic number.

126651438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

126651438 is an abundant number, since it is smaller than the sum of its proper divisors (157141962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126651438 is an equidigital number, since it uses as much as digits as its factorization.

126651438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781813 (or 781804 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 126651438 is about 11253.9521058160. The cubic root of 126651438 is about 502.1922910050.

The spelling of 126651438 in words is "one hundred twenty-six million, six hundred fifty-one thousand, four hundred thirty-eight".