11042857225 has 9 divisors (see below), whose sum is σ = 13693794517. Its totient is φ = 8833865440.

The previous prime is 11042857207. The next prime is 11042857277. The reversal of 11042857225 is 52275824011.

It is a happy number.

The square root of 11042857225 is 105085.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6754702969 + 4288154256 = 82187^2 + 65484^2 .

It is not a de Polignac number, because 11042857225 - 2⁵ = 11042857193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 514917 + ... + 535933.

Almost surely, 2^11042857225 is an apocalyptic number.

11042857225 is the 105085-th square number.

11042857225 is the 52543-rd centered octagonal number.

It is an amenable number.

11042857225 is a deficient number, since it is larger than the sum of its proper divisors (2650937292).

11042857225 is an frugal number, since it uses more digits than its factorization.

11042857225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42044 (or 21022 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 11042857225 in words is "eleven billion, forty-two million, eight hundred fifty-seven thousand, two hundred twenty-five".