2641455421 has 4 divisors (see below), whose sum is σ = 2881587744. Its totient is φ = 2401323100.

The previous prime is 2641455389. The next prime is 2641455431. The reversal of 2641455421 is 1245541462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2641455421 - 2⁵ = 2641455389 is a prime.

It is a super-2 number, since 2×2641455421² = 13954573482260574482, 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 (2641455431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120066145 + ... + 120066166.

It is an arithmetic number, because the mean of its divisors is an integer number (720396936).

Almost surely, 2^2641455421 is an apocalyptic number.

It is an amenable number.

2641455421 is a deficient number, since it is larger than the sum of its proper divisors (240132323).

2641455421 is a wasteful number, since it uses less digits than its factorization.

2641455421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240132322.

The product of its digits is 38400, while the sum is 34.

The square root of 2641455421 is about 51395.0914095889. The cubic root of 2641455421 is about 1382.3385785129.

Adding to 2641455421 its reverse (1245541462), we get a palindrome (3886996883).

The spelling of 2641455421 in words is "two billion, six hundred forty-one million, four hundred fifty-five thousand, four hundred twenty-one".