30401021 has 6 divisors (see below), whose sum is σ = 35364510. Its totient is φ = 26057976.

The previous prime is 30401003. The next prime is 30401053. The reversal of 30401021 is 12010403.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 6528025 = 4886^2 + 2555^2 .

It is not a de Polignac number, because 30401021 - 2¹⁴ = 30384637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30400993 and 30401011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30401071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 310166 + ... + 310263.

It is an arithmetic number, because the mean of its divisors is an integer number (5894085).

Almost surely, 2^30401021 is an apocalyptic number.

It is an amenable number.

30401021 is a deficient number, since it is larger than the sum of its proper divisors (4963489).

30401021 is an equidigital number, since it uses as much as digits as its factorization.

30401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620443 (or 620436 counting only the distinct ones).

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

The square root of 30401021 is about 5513.7120889651. The cubic root of 30401021 is about 312.1016440960.

Adding to 30401021 its reverse (12010403), we get a palindrome (42411424).

The spelling of 30401021 in words is "thirty million, four hundred one thousand, twenty-one".