4520631 has 4 divisors (see below), whose sum is σ = 6027512. Its totient is φ = 3013752.

The previous prime is 4520629. The next prime is 4520647. The reversal of 4520631 is 1360254.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4520631 - 2¹ = 4520629 is a prime.

It is a super-2 number, since 2×4520631² = 40872209276322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

4520631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4520598 and 4520607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4520611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753436 + ... + 753441.

It is an arithmetic number, because the mean of its divisors is an integer number (1506878).

Almost surely, 2^4520631 is an apocalyptic number.

4520631 is a deficient number, since it is larger than the sum of its proper divisors (1506881).

4520631 is a wasteful number, since it uses less digits than its factorization.

4520631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506880.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 4520631 is about 2126.1775560851. The cubic root of 4520631 is about 165.3482817772.

Adding to 4520631 its reverse (1360254), we get a palindrome (5880885).

It can be divided in two parts, 4520 and 631, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 4520631 in words is "four million, five hundred twenty thousand, six hundred thirty-one".