501254661 has 8 divisors (see below), whose sum is σ = 674586144. Its totient is φ = 331046480.

The previous prime is 501254659. The next prime is 501254681. The reversal of 501254661 is 166452105.

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 501254661 - 2¹ = 501254659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501254681) 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, 780450 + ... + 781091.

It is an arithmetic number, because the mean of its divisors is an integer number (84323268).

Almost surely, 2^501254661 is an apocalyptic number.

It is an amenable number.

501254661 is a deficient number, since it is larger than the sum of its proper divisors (173331483).

501254661 is a wasteful number, since it uses less digits than its factorization.

501254661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561651.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 501254661 is about 22388.7172700894. The cubic root of 501254661 is about 794.3638548549.

The spelling of 501254661 in words is "five hundred one million, two hundred fifty-four thousand, six hundred sixty-one".