2427561 has 24 divisors (see below), whose sum is σ = 3706560. Its totient is φ = 1528800.

The previous prime is 2427547. The next prime is 2427571. The reversal of 2427561 is 1657242.

It is not a de Polignac number, because 2427561 - 2¹⁰ = 2426537 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2427521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18466 + ... + 18596.

It is an arithmetic number, because the mean of its divisors is an integer number (154440).

2^2427561 is an apocalyptic number.

It is an amenable number.

2427561 is a deficient number, since it is larger than the sum of its proper divisors (1278999).

2427561 is a wasteful number, since it uses less digits than its factorization.

2427561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 234 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2427561 is about 1558.0632207969. The cubic root of 2427561 is about 134.3971473140.

It can be divided in two parts, 24275 and 61, that added together give a square (24336 = 156²).

The spelling of 2427561 in words is "two million, four hundred twenty-seven thousand, five hundred sixty-one".