30122725 has 12 divisors (see below), whose sum is σ = 39549924. Its totient is φ = 22680320.

The previous prime is 30122717. The next prime is 30122737. The reversal of 30122725 is 52722103.

It can be written as a sum of positive squares in 6 ways, for example, as 3682561 + 26440164 = 1919^2 + 5142^2 .

It is not a de Polignac number, because 30122725 - 2³ = 30122717 is a prime.

It is a super-2 number, since 2×30122725² = 1814757122851250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30122696 and 30122705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35014 + ... + 35863.

It is an arithmetic number, because the mean of its divisors is an integer number (3295827).

Almost surely, 2^30122725 is an apocalyptic number.

It is an amenable number.

30122725 is a deficient number, since it is larger than the sum of its proper divisors (9427199).

30122725 is a wasteful number, since it uses less digits than its factorization.

30122725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70904 (or 70899 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30122725 is about 5488.4173492911. The cubic root of 30122725 is about 311.1463798121.

Adding to 30122725 its reverse (52722103), we get a palindrome (82844828).

The spelling of 30122725 in words is "thirty million, one hundred twenty-two thousand, seven hundred twenty-five".