126438901 has 4 divisors (see below), whose sum is σ = 133093600. Its totient is φ = 119784204.

The previous prime is 126438857. The next prime is 126438913. The reversal of 126438901 is 109834621.

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 a de Polignac number, because none of the positive numbers 2^k-126438901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126438001) 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, 3327321 + ... + 3327358.

It is an arithmetic number, because the mean of its divisors is an integer number (33273400).

Almost surely, 2^126438901 is an apocalyptic number.

It is an amenable number.

126438901 is a deficient number, since it is larger than the sum of its proper divisors (6654699).

126438901 is an equidigital number, since it uses as much as digits as its factorization.

126438901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654698.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 126438901 is about 11244.5053692904. The cubic root of 126438901 is about 501.9112198358.

The spelling of 126438901 in words is "one hundred twenty-six million, four hundred thirty-eight thousand, nine hundred one".