126353721 has 8 divisors (see below), whose sum is σ = 181431040. Its totient is φ = 77756112.

The previous prime is 126353713. The next prime is 126353723. The reversal of 126353721 is 127353621.

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

It is not a de Polignac number, because 126353721 - 2³ = 126353713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126353723) 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, 1619881 + ... + 1619958.

It is an arithmetic number, because the mean of its divisors is an integer number (22678880).

Almost surely, 2^126353721 is an apocalyptic number.

It is an amenable number.

126353721 is a deficient number, since it is larger than the sum of its proper divisors (55077319).

126353721 is a wasteful number, since it uses less digits than its factorization.

126353721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239855.

The product of its digits is 7560, while the sum is 30.

The square root of 126353721 is about 11240.7171034592. The cubic root of 126353721 is about 501.7984844841.

The spelling of 126353721 in words is "one hundred twenty-six million, three hundred fifty-three thousand, seven hundred twenty-one".