424721645 has 8 divisors (see below), whose sum is σ = 516844800. Its totient is φ = 334991440.

The previous prime is 424721641. The next prime is 424721677. The reversal of 424721645 is 546127424.

It is a happy number.

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

It is not a de Polignac number, because 424721645 - 2² = 424721641 is a prime.

It is a super-3 number, since 3×424721645³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424721641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597845 + ... + 598554.

It is an arithmetic number, because the mean of its divisors is an integer number (64605600).

Almost surely, 2^424721645 is an apocalyptic number.

It is an amenable number.

424721645 is a deficient number, since it is larger than the sum of its proper divisors (92123155).

424721645 is a wasteful number, since it uses less digits than its factorization.

424721645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196475.

The product of its digits is 53760, while the sum is 35.

The square root of 424721645 is about 20608.7759219222. The cubic root of 424721645 is about 751.6831207214.

The spelling of 424721645 in words is "four hundred twenty-four million, seven hundred twenty-one thousand, six hundred forty-five".