30752421 has 8 divisors (see below), whose sum is σ = 46860864. Its totient is φ = 17572800.

The previous prime is 30752399. The next prime is 30752467. The reversal of 30752421 is 12425703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30752421 - 2⁹ = 30751909 is a prime.

It is a super-2 number, since 2×30752421² = 1891422794722482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30752391 and 30752400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30752321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732180 + ... + 732221.

It is an arithmetic number, because the mean of its divisors is an integer number (5857608).

Almost surely, 2^30752421 is an apocalyptic number.

It is an amenable number.

30752421 is a deficient number, since it is larger than the sum of its proper divisors (16108443).

30752421 is a wasteful number, since it uses less digits than its factorization.

30752421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464411.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 30752421 is about 5545.4865431268. The cubic root of 30752421 is about 313.2995495742.

The spelling of 30752421 in words is "thirty million, seven hundred fifty-two thousand, four hundred twenty-one".