421342445 has 16 divisors (see below), whose sum is σ = 524204352. Its totient is φ = 324877440.

The previous prime is 421342429. The next prime is 421342447. The reversal of 421342445 is 544243124.

It is not a de Polignac number, because 421342445 - 2⁴ = 421342429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421342447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4634 + ... + 29396.

It is an arithmetic number, because the mean of its divisors is an integer number (32762772).

Almost surely, 2^421342445 is an apocalyptic number.

It is an amenable number.

421342445 is a deficient number, since it is larger than the sum of its proper divisors (102861907).

421342445 is a wasteful number, since it uses less digits than its factorization.

421342445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24892.

The product of its digits is 15360, while the sum is 29.

The square root of 421342445 is about 20526.6277064695. The cubic root of 421342445 is about 749.6842789641.

Adding to 421342445 its reverse (544243124), we get a palindrome (965585569).

The spelling of 421342445 in words is "four hundred twenty-one million, three hundred forty-two thousand, four hundred forty-five".