126321605 has 8 divisors (see below), whose sum is σ = 151734912. Its totient is φ = 100957968.

The previous prime is 126321551. The next prime is 126321607. The reversal of 126321605 is 506123621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126321605 - 2⁶ = 126321541 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 (126321607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6569 + ... + 17198.

It is an arithmetic number, because the mean of its divisors is an integer number (18966864).

Almost surely, 2^126321605 is an apocalyptic number.

It is an amenable number.

126321605 is a deficient number, since it is larger than the sum of its proper divisors (25413307).

126321605 is a wasteful number, since it uses less digits than its factorization.

126321605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24835.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 126321605 is about 11239.2884561257. The cubic root of 126321605 is about 501.7559659480.

The spelling of 126321605 in words is "one hundred twenty-six million, three hundred twenty-one thousand, six hundred five".