1085509452 has 18 divisors (see below), whose sum is σ = 2533121724. Its totient is φ = 361798440.

The previous prime is 1085509429. The next prime is 1085509471. The reversal of 1085509452 is 2549055801.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1085509452.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109377 + ... + 118887.

Almost surely, 2^1085509452 is an apocalyptic number.

1085509452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1085509452 is an abundant number, since it is smaller than the sum of its proper divisors (1447612272).

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

1085509452 is an frugal number, since it uses more digits than its factorization.

1085509452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19029 (or 9516 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 1085509452 is about 32947.0704615752. The cubic root of 1085509452 is about 1027.7272449826.

The spelling of 1085509452 in words is "one billion, eighty-five million, five hundred nine thousand, four hundred fifty-two".