126591630 has 32 divisors (see below), whose sum is σ = 331440768. Its totient is φ = 30688800.

The previous prime is 126591629. The next prime is 126591637. The reversal of 126591630 is 36195621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 126591591 and 126591600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126591637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191476 + ... + 192135.

It is an arithmetic number, because the mean of its divisors is an integer number (10357524).

Almost surely, 2^126591630 is an apocalyptic number.

126591630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126591630 is an abundant number, since it is smaller than the sum of its proper divisors (204849138).

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

126591630 is a wasteful number, since it uses less digits than its factorization.

126591630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383632.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 126591630 is about 11251.2945921792. The cubic root of 126591630 is about 502.1132292746.

The spelling of 126591630 in words is "one hundred twenty-six million, five hundred ninety-one thousand, six hundred thirty".