2739561 has 12 divisors (see below), whose sum is σ = 4015536. Its totient is φ = 1660120.

The previous prime is 2739559. The next prime is 2739577. The reversal of 2739561 is 1659372.

It is not a de Polignac number, because 2739561 - 2¹ = 2739559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

2739561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2739761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3411 + ... + 4136.

It is an arithmetic number, because the mean of its divisors is an integer number (334628).

2^2739561 is an apocalyptic number.

It is an amenable number.

2739561 is a deficient number, since it is larger than the sum of its proper divisors (1275975).

2739561 is a wasteful number, since it uses less digits than its factorization.

2739561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572 (or 7561 counting only the distinct ones).

The product of its digits is 11340, while the sum is 33.

The square root of 2739561 is about 1655.1619256133. The cubic root of 2739561 is about 139.9244660574.

The spelling of 2739561 in words is "two million, seven hundred thirty-nine thousand, five hundred sixty-one".