1090731025 has 6 divisors (see below), whose sum is σ = 1352506502. Its totient is φ = 872584800.

The previous prime is 1090731023. The next prime is 1090731049. The reversal of 1090731025 is 5201370901.

It can be written as a sum of positive squares in 3 ways, for example, as 95707089 + 995023936 = 9783^2 + 31544^2 .

It is not a de Polignac number, because 1090731025 - 2¹ = 1090731023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1090730984 and 1090731002.

It is not an unprimeable number, because it can be changed into a prime (1090731023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21814596 + ... + 21814645.

Almost surely, 2^1090731025 is an apocalyptic number.

It is an amenable number.

1090731025 is a deficient number, since it is larger than the sum of its proper divisors (261775477).

1090731025 is an equidigital number, since it uses as much as digits as its factorization.

1090731025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43629251 (or 43629246 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 1090731025 is about 33026.2172372193. The cubic root of 1090731025 is about 1029.3724851487.

The spelling of 1090731025 in words is "one billion, ninety million, seven hundred thirty-one thousand, twenty-five".