2561432 has 8 divisors (see below), whose sum is σ = 4802700. Its totient is φ = 1280712.

The previous prime is 2561431. The next prime is 2561491. The reversal of 2561432 is 2341652.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2561398 and 2561407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160082 + ... + 160097.

2^2561432 is an apocalyptic number.

It is an amenable number.

2561432 is a deficient number, since it is larger than the sum of its proper divisors (2241268).

2561432 is a wasteful number, since it uses less digits than its factorization.

2561432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320185 (or 320181 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 2561432 is about 1600.4474374374. The cubic root of 2561432 is about 136.8235781208.

The spelling of 2561432 in words is "two million, five hundred sixty-one thousand, four hundred thirty-two".