30707421 has 4 divisors (see below), whose sum is σ = 40943232. Its totient is φ = 20471612.

The previous prime is 30707419. The next prime is 30707441. The reversal of 30707421 is 12470703.

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.

It is a cyclic number.

It is not a de Polignac number, because 30707421 - 2¹ = 30707419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30707391 and 30707400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30707441) 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, 5117901 + ... + 5117906.

It is an arithmetic number, because the mean of its divisors is an integer number (10235808).

Almost surely, 2^30707421 is an apocalyptic number.

It is an amenable number.

30707421 is a deficient number, since it is larger than the sum of its proper divisors (10235811).

30707421 is a wasteful number, since it uses less digits than its factorization.

30707421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10235810.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 30707421 is about 5541.4277041210. The cubic root of 30707421 is about 313.1466579575.

The spelling of 30707421 in words is "thirty million, seven hundred seven thousand, four hundred twenty-one".