420621277 has 4 divisors (see below), whose sum is σ = 421948476. Its totient is φ = 419294080.

The previous prime is 420621247. The next prime is 420621343. The reversal of 420621277 is 772126024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6661561 + 413959716 = 2581^2 + 20346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420621277 is a prime.

It is a super-2 number, since 2×420621277² = 353844517330221458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420621247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663124 + ... + 663757.

It is an arithmetic number, because the mean of its divisors is an integer number (105487119).

Almost surely, 2^420621277 is an apocalyptic number.

It is an amenable number.

420621277 is a deficient number, since it is larger than the sum of its proper divisors (1327199).

420621277 is a wasteful number, since it uses less digits than its factorization.

420621277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327198.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 420621277 is about 20509.0535374015. The cubic root of 420621277 is about 749.2563158593.

The spelling of 420621277 in words is "four hundred twenty million, six hundred twenty-one thousand, two hundred seventy-seven".