420674221 has 4 divisors (see below), whose sum is σ = 458917344. Its totient is φ = 382431100.

The previous prime is 420674183. The next prime is 420674251. The reversal of 420674221 is 122476024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420674221 - 2⁹ = 420673709 is a prime.

It is a super-3 number, since 3×420674221³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420674221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420674251) 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, 19121545 + ... + 19121566.

It is an arithmetic number, because the mean of its divisors is an integer number (114729336).

Almost surely, 2^420674221 is an apocalyptic number.

It is an amenable number.

420674221 is a deficient number, since it is larger than the sum of its proper divisors (38243123).

420674221 is a wasteful number, since it uses less digits than its factorization.

420674221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38243122.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 420674221 is about 20510.3442438200. The cubic root of 420674221 is about 749.2877510753.

The spelling of 420674221 in words is "four hundred twenty million, six hundred seventy-four thousand, two hundred twenty-one".