2742520561 has 4 divisors (see below), whose sum is σ = 2991840624. Its totient is φ = 2493200500.

The previous prime is 2742520537. The next prime is 2742520567. The reversal of 2742520561 is 1650252472.

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 not a de Polignac number, because 2742520561 - 2⁷ = 2742520433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2742520567) 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, 124660015 + ... + 124660036.

It is an arithmetic number, because the mean of its divisors is an integer number (747960156).

Almost surely, 2^2742520561 is an apocalyptic number.

It is an amenable number.

2742520561 is a deficient number, since it is larger than the sum of its proper divisors (249320063).

2742520561 is a wasteful number, since it uses less digits than its factorization.

2742520561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249320062.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 2742520561 is about 52369.0802000570. The cubic root of 2742520561 is about 1399.7483494963.

The spelling of 2742520561 in words is "two billion, seven hundred forty-two million, five hundred twenty thousand, five hundred sixty-one".