30540421 has 2 divisors, whose sum is σ = 30540422. Its totient is φ = 30540420.

The previous prime is 30540413. The next prime is 30540463. The reversal of 30540421 is 12404503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25300900 + 5239521 = 5030^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 30540421 - 2³ = 30540413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30540401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15270210 + 15270211.

It is an arithmetic number, because the mean of its divisors is an integer number (15270211).

Almost surely, 2^30540421 is an apocalyptic number.

It is an amenable number.

30540421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30540421 is an equidigital number, since it uses as much as digits as its factorization.

30540421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 30540421 is about 5526.3388423078. The cubic root of 30540421 is about 312.5779509008.

Adding to 30540421 its reverse (12404503), we get a palindrome (42944924).

The spelling of 30540421 in words is "thirty million, five hundred forty thousand, four hundred twenty-one".