421320445 has 16 divisors (see below), whose sum is σ = 622258560. Its totient is φ = 266681664.

The previous prime is 421320437. The next prime is 421320451. The reversal of 421320445 is 544023124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421320445 - 2³ = 421320437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462535 + ... + 463444.

It is an arithmetic number, because the mean of its divisors is an integer number (38891160).

Almost surely, 2^421320445 is an apocalyptic number.

It is an amenable number.

421320445 is a deficient number, since it is larger than the sum of its proper divisors (200938115).

421320445 is a wasteful number, since it uses less digits than its factorization.

421320445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926004.

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

The square root of 421320445 is about 20526.0918101815. The cubic root of 421320445 is about 749.6712307169.

Adding to 421320445 its reverse (544023124), we get a palindrome (965343569).

The spelling of 421320445 in words is "four hundred twenty-one million, three hundred twenty thousand, four hundred forty-five".