30561401 has 4 divisors (see below), whose sum is σ = 32912292. Its totient is φ = 28210512.

The previous prime is 30561397. The next prime is 30561403. The reversal of 30561401 is 10416503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18318400 + 12243001 = 4280^2 + 3499^2 .

It is a cyclic number.

It is not a de Polignac number, because 30561401 - 2² = 30561397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30561403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175426 + ... + 1175451.

It is an arithmetic number, because the mean of its divisors is an integer number (8228073).

Almost surely, 2^30561401 is an apocalyptic number.

It is an amenable number.

30561401 is a deficient number, since it is larger than the sum of its proper divisors (2350891).

30561401 is a wasteful number, since it uses less digits than its factorization.

30561401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350890.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 30561401 is about 5528.2366989846. The cubic root of 30561401 is about 312.6495105377.

Adding to 30561401 its reverse (10416503), we get a palindrome (40977904).

The spelling of 30561401 in words is "thirty million, five hundred sixty-one thousand, four hundred one".