2745264421 has 4 divisors (see below), whose sum is σ = 2747754432. Its totient is φ = 2742774412.

The previous prime is 2745264391. The next prime is 2745264433. The reversal of 2745264421 is 1244625472.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2745264421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745264451) 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, 1243351 + ... + 1245556.

It is an arithmetic number, because the mean of its divisors is an integer number (686938608).

Almost surely, 2^2745264421 is an apocalyptic number.

It is an amenable number.

2745264421 is a deficient number, since it is larger than the sum of its proper divisors (2490011).

2745264421 is a wasteful number, since it uses less digits than its factorization.

2745264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490010.

The product of its digits is 107520, while the sum is 37.

The square root of 2745264421 is about 52395.2709793546. The cubic root of 2745264421 is about 1400.2150045641.

Adding to 2745264421 its reverse (1244625472), we get a palindrome (3989889893).

The spelling of 2745264421 in words is "two billion, seven hundred forty-five million, two hundred sixty-four thousand, four hundred twenty-one".