30420525 has 12 divisors (see below), whose sum is σ = 50295392. Its totient is φ = 16224240.

The previous prime is 30420521. The next prime is 30420529. The reversal of 30420525 is 52502403.

It is an interprime number because it is at equal distance from previous prime (30420521) and next prime (30420529).

It is not a de Polignac number, because 30420525 - 2² = 30420521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202729 + ... + 202878.

Almost surely, 2^30420525 is an apocalyptic number.

It is an amenable number.

30420525 is a deficient number, since it is larger than the sum of its proper divisors (19874867).

30420525 is a wasteful number, since it uses less digits than its factorization.

30420525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405620 (or 405615 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 30420525 is about 5515.4804867754. The cubic root of 30420525 is about 312.1683735343.

Adding to 30420525 its reverse (52502403), we get a palindrome (82922928).

The spelling of 30420525 in words is "thirty million, four hundred twenty thousand, five hundred twenty-five".