1099390625 has 28 divisors (see below), whose sum is σ = 1394982144. Its totient is φ = 866250000.

The previous prime is 1099390573. The next prime is 1099390681. The reversal of 1099390625 is 5260939901.

It is not a de Polignac number, because 1099390625 - 2¹⁰ = 1099389601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1108880 + ... + 1109870.

Almost surely, 2^1099390625 is an apocalyptic number.

It is an amenable number.

1099390625 is a deficient number, since it is larger than the sum of its proper divisors (295591519).

1099390625 is an frugal number, since it uses more digits than its factorization.

1099390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 1099390625 is about 33157.0599571192. The cubic root of 1099390625 is about 1032.0894603381.

The spelling of 1099390625 in words is "one billion, ninety-nine million, three hundred ninety thousand, six hundred twenty-five".