120421409 has 2 divisors, whose sum is σ = 120421410. Its totient is φ = 120421408.

The previous prime is 120421393. The next prime is 120421417. The reversal of 120421409 is 904124021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 55457809 = 8060^2 + 7447^2 .

It is a cyclic number.

It is not a de Polignac number, because 120421409 - 2⁴ = 120421393 is a prime.

It is not a weakly prime, because it can be changed into another prime (120421439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60210704 + 60210705.

It is an arithmetic number, because the mean of its divisors is an integer number (60210705).

Almost surely, 2^120421409 is an apocalyptic number.

It is an amenable number.

120421409 is a deficient number, since it is larger than the sum of its proper divisors (1).

120421409 is an equidigital number, since it uses as much as digits as its factorization.

120421409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 120421409 is about 10973.6688942213. The cubic root of 120421409 is about 493.8191202919.

The spelling of 120421409 in words is "one hundred twenty million, four hundred twenty-one thousand, four hundred nine".