1085409172 has 12 divisors (see below), whose sum is σ = 1899729216. Its totient is φ = 542629400.

The previous prime is 1085409137. The next prime is 1085409191. The reversal of 1085409172 is 2719045801.

It is a super-2 number, since 2×1085409172² = 2356226141323451168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25047 + ... + 52897.

It is an arithmetic number, because the mean of its divisors is an integer number (158310768).

Almost surely, 2^1085409172 is an apocalyptic number.

It is an amenable number.

1085409172 is a deficient number, since it is larger than the sum of its proper divisors (814320044).

1085409172 is a wasteful number, since it uses less digits than its factorization.

1085409172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37598 (or 37596 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1085409172 is about 32945.5485915776. The cubic root of 1085409172 is about 1027.6955966594.

The spelling of 1085409172 in words is "one billion, eighty-five million, four hundred nine thousand, one hundred seventy-two".