421545965 has 8 divisors (see below), whose sum is σ = 506007648. Its totient is φ = 337135120.

The previous prime is 421545947. The next prime is 421545979. The reversal of 421545965 is 569545124.

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-421545965 is a prime.

It is a Duffinian number.

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, 8870 + ... + 30360.

It is an arithmetic number, because the mean of its divisors is an integer number (63250956).

Almost surely, 2^421545965 is an apocalyptic number.

It is an amenable number.

421545965 is a deficient number, since it is larger than the sum of its proper divisors (84461683).

421545965 is a wasteful number, since it uses less digits than its factorization.

421545965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25419.

The product of its digits is 216000, while the sum is 41.

The square root of 421545965 is about 20531.5845710944. The cubic root of 421545965 is about 749.8049655828.

The spelling of 421545965 in words is "four hundred twenty-one million, five hundred forty-five thousand, nine hundred sixty-five".