126604501 has 4 divisors (see below), whose sum is σ = 128750400. Its totient is φ = 124458604.

The previous prime is 126604487. The next prime is 126604519. The reversal of 126604501 is 105406621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 105406621 = 317 ⋅332513.

It is a cyclic number.

It is not a de Polignac number, because 126604501 - 2⁵ = 126604469 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 (126604561) 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, 1072861 + ... + 1072978.

It is an arithmetic number, because the mean of its divisors is an integer number (32187600).

Almost surely, 2^126604501 is an apocalyptic number.

It is an amenable number.

126604501 is a deficient number, since it is larger than the sum of its proper divisors (2145899).

126604501 is an equidigital number, since it uses as much as digits as its factorization.

126604501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145898.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 126604501 is about 11251.8665562652. The cubic root of 126604501 is about 502.1302458824.

It can be divided in two parts, 12660 and 4501, that added together give a square (17161 = 131²).

The spelling of 126604501 in words is "one hundred twenty-six million, six hundred four thousand, five hundred one".