1102561 has 4 divisors (see below), whose sum is σ = 1106224. Its totient is φ = 1098900.

The previous prime is 1102553. The next prime is 1102567. The reversal of 1102561 is 1652011.

It is a happy number.

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 1102561 - 2³ = 1102553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1102567) 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, 1335 + ... + 1996.

It is an arithmetic number, because the mean of its divisors is an integer number (276556).

2^1102561 is an apocalyptic number.

It is an amenable number.

1102561 is a deficient number, since it is larger than the sum of its proper divisors (3663).

1102561 is an equidigital number, since it uses as much as digits as its factorization.

1102561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1102561 is about 1050.0290472173. The cubic root of 1102561 is about 103.3080606480.

Adding to 1102561 its reverse (1652011), we get a palindrome (2754572).

The spelling of 1102561 in words is "one million, one hundred two thousand, five hundred sixty-one".