30125405 has 8 divisors (see below), whose sum is σ = 36185784. Its totient is φ = 24076800.

The previous prime is 30125383. The next prime is 30125429. The reversal of 30125405 is 50452103.

It can be written as a sum of positive squares in 4 ways, for example, as 6728836 + 23396569 = 2594^2 + 4837^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30125405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4325 + ... + 8885.

It is an arithmetic number, because the mean of its divisors is an integer number (4523223).

Almost surely, 2^30125405 is an apocalyptic number.

It is an amenable number.

30125405 is a deficient number, since it is larger than the sum of its proper divisors (6060379).

30125405 is a wasteful number, since it uses less digits than its factorization.

30125405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5887.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 30125405 is about 5488.6614943900. The cubic root of 30125405 is about 311.1556070381.

Adding to 30125405 its reverse (50452103), we get a palindrome (80577508).

The spelling of 30125405 in words is "thirty million, one hundred twenty-five thousand, four hundred five".