30421297 has 4 divisors (see below), whose sum is σ = 30465396. Its totient is φ = 30377200.

The previous prime is 30421291. The next prime is 30421333. The reversal of 30421297 is 79212403.

30421297 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79212403 = 89 ⋅890027.

It can be written as a sum of positive squares in 2 ways, for example, as 27050401 + 3370896 = 5201^2 + 1836^2 .

It is a cyclic number.

It is not a de Polignac number, because 30421297 - 2⁷ = 30421169 is a prime.

It is a super-2 number, since 2×30421297² = 1850910622324418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30421291) 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, 20998 + ... + 22399.

It is an arithmetic number, because the mean of its divisors is an integer number (7616349).

Almost surely, 2^30421297 is an apocalyptic number.

It is an amenable number.

30421297 is a deficient number, since it is larger than the sum of its proper divisors (44099).

30421297 is an equidigital number, since it uses as much as digits as its factorization.

30421297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44098.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 30421297 is about 5515.5504711679. The cubic root of 30421297 is about 312.1710142069.

The spelling of 30421297 in words is "thirty million, four hundred twenty-one thousand, two hundred ninety-seven".