126242637 has 4 divisors (see below), whose sum is σ = 168323520. Its totient is φ = 84161756.

The previous prime is 126242617. The next prime is 126242639. The reversal of 126242637 is 736242621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126242637 - 2⁶ = 126242573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126242598 and 126242607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126242639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21040437 + ... + 21040442.

It is an arithmetic number, because the mean of its divisors is an integer number (42080880).

Almost surely, 2^126242637 is an apocalyptic number.

It is an amenable number.

126242637 is a deficient number, since it is larger than the sum of its proper divisors (42080883).

126242637 is an equidigital number, since it uses as much as digits as its factorization.

126242637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42080882.

The product of its digits is 24192, while the sum is 33.

The square root of 126242637 is about 11235.7748731452. The cubic root of 126242637 is about 501.6513891564.

The spelling of 126242637 in words is "one hundred twenty-six million, two hundred forty-two thousand, six hundred thirty-seven".