1661192 has 16 divisors (see below), whose sum is σ = 3354540. Its totient is φ = 766656.

The previous prime is 1661173. The next prime is 1661237. The reversal of 1661192 is 2911661.

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 7396 = 1286^2 + 86^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7883 + ... + 8090.

2^1661192 is an apocalyptic number.

It is an amenable number.

1661192 is an abundant number, since it is smaller than the sum of its proper divisors (1693348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661192 is a wasteful number, since it uses less digits than its factorization.

1661192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15992 (or 15988 counting only the distinct ones).

The product of its digits is 648, while the sum is 26.

The square root of 1661192 is about 1288.8723753731. The cubic root of 1661192 is about 118.4331490455.

The spelling of 1661192 in words is "one million, six hundred sixty-one thousand, one hundred ninety-two".