126237690 has 40 divisors (see below), whose sum is σ = 339441300. Its totient is φ = 33663168.

The previous prime is 126237677. The next prime is 126237721. The reversal of 126237690 is 96732621.

It can be written as a sum of positive squares in 2 ways, for example, as 125955729 + 281961 = 11223^2 + 531^2 .

It is a super-2 number, since 2×126237690² = 31871908753072200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77115 + ... + 78734.

Almost surely, 2^126237690 is an apocalyptic number.

126237690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126237690 is an abundant number, since it is smaller than the sum of its proper divisors (213203610).

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

126237690 is a wasteful number, since it uses less digits than its factorization.

126237690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155868 (or 155859 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 126237690 is about 11235.5547259581. The cubic root of 126237690 is about 501.6448364262.

The spelling of 126237690 in words is "one hundred twenty-six million, two hundred thirty-seven thousand, six hundred ninety".