420646533 has 8 divisors (see below), whose sum is σ = 578954496. Its totient is φ = 271384800.

The previous prime is 420646507. The next prime is 420646547. The reversal of 420646533 is 335646024.

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

It is not a de Polignac number, because 420646533 - 2⁶ = 420646469 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420646494 and 420646503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420646553) 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, 2261448 + ... + 2261633.

It is an arithmetic number, because the mean of its divisors is an integer number (72369312).

Almost surely, 2^420646533 is an apocalyptic number.

It is an amenable number.

420646533 is a deficient number, since it is larger than the sum of its proper divisors (158307963).

420646533 is a wasteful number, since it uses less digits than its factorization.

420646533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4523115.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 420646533 is about 20509.6692562313. The cubic root of 420646533 is about 749.2713118029.

It can be divided in two parts, 420 and 646533, that added together give a triangular number (646953 = T₁₁₃₇).

The spelling of 420646533 in words is "four hundred twenty million, six hundred forty-six thousand, five hundred thirty-three".