421901345 has 16 divisors (see below), whose sum is σ = 514755648. Its totient is φ = 331890240.

The previous prime is 421901339. The next prime is 421901353. The reversal of 421901345 is 543109124.

It is not a de Polignac number, because 421901345 - 2¹⁴ = 421884961 is a prime.

It is a Duffinian 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, 354842 + ... + 356028.

It is an arithmetic number, because the mean of its divisors is an integer number (32172228).

Almost surely, 2^421901345 is an apocalyptic number.

It is an amenable number.

421901345 is a deficient number, since it is larger than the sum of its proper divisors (92854303).

421901345 is a wasteful number, since it uses less digits than its factorization.

421901345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 421901345 is about 20540.2372186886. The cubic root of 421901345 is about 750.0156115269.

The spelling of 421901345 in words is "four hundred twenty-one million, nine hundred one thousand, three hundred forty-five".