646245127 has 16 divisors (see below), whose sum is σ = 732432384. Its totient is φ = 564876000.

The previous prime is 646245101. The next prime is 646245143. The reversal of 646245127 is 721542646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646245127 is a prime.

It is a super-2 number, since 2×646245127² = 835265528342492258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646245227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47502 + ... + 59572.

It is an arithmetic number, because the mean of its divisors is an integer number (45777024).

Almost surely, 2^646245127 is an apocalyptic number.

646245127 is a deficient number, since it is larger than the sum of its proper divisors (86187257).

646245127 is a wasteful number, since it uses less digits than its factorization.

646245127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270.

The product of its digits is 80640, while the sum is 37.

The square root of 646245127 is about 25421.3517933252. The cubic root of 646245127 is about 864.5678739723.

It can be divided in two parts, 64624 and 5127, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 646245127 in words is "six hundred forty-six million, two hundred forty-five thousand, one hundred twenty-seven".