1632561 has 24 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 874752.

The previous prime is 1632557. The next prime is 1632569. The reversal of 1632561 is 1652361.

It is not a de Polignac number, because 1632561 - 2² = 1632557 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1632569) 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, 5935 + ... + 6203.

It is an arithmetic number, because the mean of its divisors is an integer number (110520).

2^1632561 is an apocalyptic number.

It is an amenable number.

1632561 is a deficient number, since it is larger than the sum of its proper divisors (1019919).

1632561 is a wasteful number, since it uses less digits than its factorization.

1632561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 296 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1632561 is about 1277.7171048397. The cubic root of 1632561 is about 117.7487952960.

The spelling of 1632561 in words is "one million, six hundred thirty-two thousand, five hundred sixty-one".