30421761 has 4 divisors (see below), whose sum is σ = 40562352. Its totient is φ = 20281172.

The previous prime is 30421753. The next prime is 30421763. The reversal of 30421761 is 16712403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16712403 = 3 ⋅5570801.

It is a cyclic number.

It is not a de Polignac number, because 30421761 - 2³ = 30421753 is a prime.

It is a super-2 number, since 2×30421761² = 1850967084682242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30421763) 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, 5070291 + ... + 5070296.

It is an arithmetic number, because the mean of its divisors is an integer number (10140588).

Almost surely, 2^30421761 is an apocalyptic number.

It is an amenable number.

30421761 is a deficient number, since it is larger than the sum of its proper divisors (10140591).

30421761 is a wasteful number, since it uses less digits than its factorization.

30421761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140590.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 30421761 is about 5515.5925338988. The cubic root of 30421761 is about 312.1726013255.

The spelling of 30421761 in words is "thirty million, four hundred twenty-one thousand, seven hundred sixty-one".