30542421 has 32 divisors (see below), whose sum is σ = 53077248. Its totient is φ = 15160320.

The previous prime is 30542389. The next prime is 30542429. The reversal of 30542421 is 12424503.

It is not a de Polignac number, because 30542421 - 2⁵ = 30542389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30542429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1351 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (1658664).

Almost surely, 2^30542421 is an apocalyptic number.

It is an amenable number.

30542421 is a deficient number, since it is larger than the sum of its proper divisors (22534827).

30542421 is a wasteful number, since it uses less digits than its factorization.

30542421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 30542421 is about 5526.5197909715. The cubic root of 30542421 is about 312.5847740140.

Adding to 30542421 its reverse (12424503), we get a palindrome (42966924).

The spelling of 30542421 in words is "thirty million, five hundred forty-two thousand, four hundred twenty-one".