30642901 has 4 divisors (see below), whose sum is σ = 30663052. Its totient is φ = 30622752.

The previous prime is 30642869. The next prime is 30642929. The reversal of 30642901 is 10924603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10924603 = 277 ⋅39439.

It can be written as a sum of positive squares in 2 ways, for example, as 11062276 + 19580625 = 3326^2 + 4425^2 .

It is a cyclic number.

It is not a de Polignac number, because 30642901 - 2⁵ = 30642869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30642301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7590 + ... + 10903.

It is an arithmetic number, because the mean of its divisors is an integer number (7665763).

Almost surely, 2^30642901 is an apocalyptic number.

It is an amenable number.

30642901 is a deficient number, since it is larger than the sum of its proper divisors (20151).

30642901 is a wasteful number, since it uses less digits than its factorization.

30642901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20150.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30642901 is about 5535.6030385135. The cubic root of 30642901 is about 312.9271845234.

The spelling of 30642901 in words is "thirty million, six hundred forty-two thousand, nine hundred one".