420784545 has 64 divisors (see below), whose sum is σ = 740597760. Its totient is φ = 203212800.

The previous prime is 420784489. The next prime is 420784547. The reversal of 420784545 is 545487024.

It is not a de Polignac number, because 420784545 - 2⁷ = 420784417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420784547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 856750 + ... + 857240.

It is an arithmetic number, because the mean of its divisors is an integer number (11571840).

Almost surely, 2^420784545 is an apocalyptic number.

It is an amenable number.

420784545 is a deficient number, since it is larger than the sum of its proper divisors (319813215).

420784545 is a wasteful number, since it uses less digits than its factorization.

420784545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 179200, while the sum is 39.

The square root of 420784545 is about 20513.0335396791. The cubic root of 420784545 is about 749.3532468853.

The spelling of 420784545 in words is "four hundred twenty million, seven hundred eighty-four thousand, five hundred forty-five".