421403249 has 4 divisors (see below), whose sum is σ = 432792564. Its totient is φ = 410013936.

The previous prime is 421403221. The next prime is 421403251. The reversal of 421403249 is 942304124.

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 200732224 + 220671025 = 14168^2 + 14855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421403249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421403219) 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, 5694602 + ... + 5694675.

It is an arithmetic number, because the mean of its divisors is an integer number (108198141).

Almost surely, 2^421403249 is an apocalyptic number.

It is an amenable number.

421403249 is a deficient number, since it is larger than the sum of its proper divisors (11389315).

421403249 is a wasteful number, since it uses less digits than its factorization.

421403249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11389314.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 421403249 is about 20528.1087536090. The cubic root of 421403249 is about 749.7203395849.

The spelling of 421403249 in words is "four hundred twenty-one million, four hundred three thousand, two hundred forty-nine".