641267121 has 16 divisors (see below), whose sum is σ = 934771968. Its totient is φ = 387805200.

The previous prime is 641267093. The next prime is 641267219. The reversal of 641267121 is 121762146.

It is not a de Polignac number, because 641267121 - 2⁷ = 641266993 is a prime.

It is a super-2 number, since 2×641267121² = 822447040951257282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641267521) 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, 5395 + ... + 36216.

It is an arithmetic number, because the mean of its divisors is an integer number (58423248).

Almost surely, 2^641267121 is an apocalyptic number.

It is an amenable number.

641267121 is a deficient number, since it is larger than the sum of its proper divisors (293504847).

641267121 is a wasteful number, since it uses less digits than its factorization.

641267121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42092.

The product of its digits is 4032, while the sum is 30.

The square root of 641267121 is about 25323.2525754493. The cubic root of 641267121 is about 862.3422363829.

It can be divided in two parts, 641 and 267121, that added together give a palindrome (267762).

The spelling of 641267121 in words is "six hundred forty-one million, two hundred sixty-seven thousand, one hundred twenty-one".