126297990 has 144 divisors (see below), whose sum is σ = 411557328. Its totient is φ = 26635392.

The previous prime is 126297989. The next prime is 126298001. The reversal of 126297990 is 99792621.

126297990 is a `hidden beast` number, since 12 + 629 + 7 + 9 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 56229 + ... + 58431.

It is an arithmetic number, because the mean of its divisors is an integer number (2858037).

Almost surely, 2^126297990 is an apocalyptic number.

126297990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126297990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205778664).

126297990 is an abundant number, since it is smaller than the sum of its proper divisors (285259338).

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

126297990 is a wasteful number, since it uses less digits than its factorization.

126297990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 126297990 is about 11238.2378511936. The cubic root of 126297990 is about 501.7246973312.

It can be divided in two parts, 126 and 297990, that added together give a square (298116 = 546²).

The spelling of 126297990 in words is "one hundred twenty-six million, two hundred ninety-seven thousand, nine hundred ninety".