420243534 has 24 divisors (see below), whose sum is σ = 950116752. Its totient is φ = 133990560.

The previous prime is 420243517. The next prime is 420243547. The reversal of 420243534 is 435342024.

It is a junction number, because it is equal to n+sod(n) for n = 420243498 and 420243507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507127 + ... + 507954.

It is an arithmetic number, because the mean of its divisors is an integer number (39588198).

Almost surely, 2^420243534 is an apocalyptic number.

420243534 is an abundant number, since it is smaller than the sum of its proper divisors (529873218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420243534 is a wasteful number, since it uses less digits than its factorization.

420243534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015112 (or 1015109 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 420243534 is about 20499.8422920763. The cubic root of 420243534 is about 749.0319563930.

Adding to 420243534 its reverse (435342024), we get a palindrome (855585558).

The spelling of 420243534 in words is "four hundred twenty million, two hundred forty-three thousand, five hundred thirty-four".