420243524 has 12 divisors (see below), whose sum is σ = 760785900. Its totient is φ = 202876128.

The previous prime is 420243517. The next prime is 420243547. The reversal of 420243524 is 425342024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91546624 + 328696900 = 9568^2 + 18130^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420243493 and 420243502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811279 + ... + 1811510.

It is an arithmetic number, because the mean of its divisors is an integer number (63398825).

Almost surely, 2^420243524 is an apocalyptic number.

It is an amenable number.

420243524 is a deficient number, since it is larger than the sum of its proper divisors (340542376).

420243524 is a wasteful number, since it uses less digits than its factorization.

420243524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622822 (or 3622820 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 420243524 is about 20499.8420481720. The cubic root of 420243524 is about 749.0319504518.

Adding to 420243524 its reverse (425342024), we get a palindrome (845585548).

The spelling of 420243524 in words is "four hundred twenty million, two hundred forty-three thousand, five hundred twenty-four".