1085621090 has 32 divisors (see below), whose sum is σ = 2042394480. Its totient is φ = 414941184.

The previous prime is 1085621041. The next prime is 1085621113. The reversal of 1085621090 is 901265801.

It can be written as a sum of positive squares in 8 ways, for example, as 558046129 + 527574961 = 23623^2 + 22969^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8834 + ... + 47426.

Almost surely, 2^1085621090 is an apocalyptic number.

1085621090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1085621090 is a deficient number, since it is larger than the sum of its proper divisors (956773390).

1085621090 is a wasteful number, since it uses less digits than its factorization.

1085621090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38726.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1085621090 is about 32948.7646202403. The cubic root of 1085621090 is about 1027.7624755929.

Adding to 1085621090 its reverse (901265801), we get a palindrome (1986886891).

The spelling of 1085621090 in words is "one billion, eighty-five million, six hundred twenty-one thousand, ninety".