641272621 has 16 divisors (see below), whose sum is σ = 726667200. Its totient is φ = 560560000.

The previous prime is 641272609. The next prime is 641272633. The reversal of 641272621 is 126272146.

It is an interprime number because it is at equal distance from previous prime (641272609) and next prime (641272633).

It is not a de Polignac number, because 641272621 - 2¹¹ = 641270573 is a prime.

It is a super-2 number, since 2×641272621² = 822461148888419282, 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 (641272651) 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, 76065 + ... + 84073.

It is an arithmetic number, because the mean of its divisors is an integer number (45416700).

Almost surely, 2^641272621 is an apocalyptic number.

It is an amenable number.

641272621 is a deficient number, since it is larger than the sum of its proper divisors (85394579).

641272621 is a wasteful number, since it uses less digits than its factorization.

641272621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8300.

The product of its digits is 8064, while the sum is 31.

The square root of 641272621 is about 25323.3611710610. The cubic root of 641272621 is about 862.3447017459.

The spelling of 641272621 in words is "six hundred forty-one million, two hundred seventy-two thousand, six hundred twenty-one".