126301721 has 32 divisors (see below), whose sum is σ = 173295360. Its totient is φ = 89081856.

The previous prime is 126301711. The next prime is 126301727. The reversal of 126301721 is 127103621.

It is a cyclic number.

It is not a de Polignac number, because 126301721 - 2¹⁴ = 126285337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126301727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27245 + ... + 31541.

It is an arithmetic number, because the mean of its divisors is an integer number (5415480).

Almost surely, 2^126301721 is an apocalyptic number.

It is an amenable number.

126301721 is a deficient number, since it is larger than the sum of its proper divisors (46993639).

126301721 is a wasteful number, since it uses less digits than its factorization.

126301721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4353.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 126301721 is about 11238.4038457425. The cubic root of 126301721 is about 501.7296378068.

The spelling of 126301721 in words is "one hundred twenty-six million, three hundred one thousand, seven hundred twenty-one".