421403245 has 8 divisors (see below), whose sum is σ = 505808640. Its totient is φ = 337039440.

The previous prime is 421403221. The next prime is 421403251. The reversal of 421403245 is 542304124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-421403245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19960 + ... + 35230.

It is an arithmetic number, because the mean of its divisors is an integer number (63226080).

Almost surely, 2^421403245 is an apocalyptic number.

It is an amenable number.

421403245 is a deficient number, since it is larger than the sum of its proper divisors (84405395).

421403245 is a wasteful number, since it uses less digits than its factorization.

421403245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20795.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 421403245 is about 20528.1086561817. The cubic root of 421403245 is about 749.7203372127.

Adding to 421403245 its reverse (542304124), we get a palindrome (963707369).

The spelling of 421403245 in words is "four hundred twenty-one million, four hundred three thousand, two hundred forty-five".