420321137 has 2 divisors, whose sum is σ = 420321138. Its totient is φ = 420321136.

The previous prime is 420321119. The next prime is 420321151. The reversal of 420321137 is 731123024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384512881 + 35808256 = 19609^2 + 5984^2 .

It is a cyclic number.

It is not a de Polignac number, because 420321137 - 2²⁰ = 419272561 is a prime.

It is not a weakly prime, because it can be changed into another prime (420321197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210160568 + 210160569.

It is an arithmetic number, because the mean of its divisors is an integer number (210160569).

Almost surely, 2^420321137 is an apocalyptic number.

It is an amenable number.

420321137 is a deficient number, since it is larger than the sum of its proper divisors (1).

420321137 is an equidigital number, since it uses as much as digits as its factorization.

420321137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 420321137 is about 20501.7349753625. The cubic root of 420321137 is about 749.0780594615.

The spelling of 420321137 in words is "four hundred twenty million, three hundred twenty-one thousand, one hundred thirty-seven".