1561199 has 8 divisors (see below), whose sum is σ = 1624320. Its totient is φ = 1499416.

The previous prime is 1561193. The next prime is 1561213. The reversal of 1561199 is 9911651.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1561199 - 2¹² = 1557103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2492 + ... + 3054.

It is an arithmetic number, because the mean of its divisors is an integer number (203040).

2^1561199 is an apocalyptic number.

1561199 is a deficient number, since it is larger than the sum of its proper divisors (63121).

1561199 is an equidigital number, since it uses as much as digits as its factorization.

1561199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its digits is 2430, while the sum is 32.

The square root of 1561199 is about 1249.4794916284. The cubic root of 1561199 is about 116.0075054597.

The spelling of 1561199 in words is "one million, five hundred sixty-one thousand, one hundred ninety-nine".