30400121 has 4 divisors (see below), whose sum is σ = 30427044. Its totient is φ = 30373200.

The previous prime is 30400109. The next prime is 30400127. The reversal of 30400121 is 12100403.

It is a happy number.

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 25110121 + 5290000 = 5011^2 + 2300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30400121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30400127) 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, 11690 + ... + 14051.

It is an arithmetic number, because the mean of its divisors is an integer number (7606761).

Almost surely, 2^30400121 is an apocalyptic number.

It is an amenable number.

30400121 is a deficient number, since it is larger than the sum of its proper divisors (26923).

30400121 is a wasteful number, since it uses less digits than its factorization.

30400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26922.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30400121 is about 5513.6304736535. The cubic root of 30400121 is about 312.0985642186.

Adding to 30400121 its reverse (12100403), we get a palindrome (42500524).

The spelling of 30400121 in words is "thirty million, four hundred thousand, one hundred twenty-one".