421155377 has 2 divisors, whose sum is σ = 421155378. Its totient is φ = 421155376.

The previous prime is 421155359. The next prime is 421155421. The reversal of 421155377 is 773551124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368025856 + 53129521 = 19184^2 + 7289^2 .

It is a cyclic number.

It is not a de Polignac number, because 421155377 - 2¹² = 421151281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421155307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210577688 + 210577689.

It is an arithmetic number, because the mean of its divisors is an integer number (210577689).

Almost surely, 2^421155377 is an apocalyptic number.

It is an amenable number.

421155377 is a deficient number, since it is larger than the sum of its proper divisors (1).

421155377 is an equidigital number, since it uses as much as digits as its factorization.

421155377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 35.

The square root of 421155377 is about 20522.0704852118. The cubic root of 421155377 is about 749.5733140389.

The spelling of 421155377 in words is "four hundred twenty-one million, one hundred fifty-five thousand, three hundred seventy-seven".