421003357 has 4 divisors (see below), whose sum is σ = 421059420. Its totient is φ = 420947296.

The previous prime is 421003321. The next prime is 421003361. The reversal of 421003357 is 753300124.

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 30980356 + 390023001 = 5566^2 + 19749^2 .

It is a cyclic number.

It is not a de Polignac number, because 421003357 - 2⁷ = 421003229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421093357) 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, 14632 + ... + 32497.

It is an arithmetic number, because the mean of its divisors is an integer number (105264855).

Almost surely, 2^421003357 is an apocalyptic number.

It is an amenable number.

421003357 is a deficient number, since it is larger than the sum of its proper divisors (56063).

421003357 is an equidigital number, since it uses as much as digits as its factorization.

421003357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56062.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 421003357 is about 20518.3663336046. The cubic root of 421003357 is about 749.4831146694.

The spelling of 421003357 in words is "four hundred twenty-one million, three thousand, three hundred fifty-seven".