815123452 has 48 divisors (see below), whose sum is σ = 1699536384. Its totient is φ = 337176000.

The previous prime is 815123443. The next prime is 815123461. The reversal of 815123452 is 254321518.

It is an interprime number because it is at equal distance from previous prime (815123443) and next prime (815123461).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30577 + ... + 50647.

It is an arithmetic number, because the mean of its divisors is an integer number (35407008).

Almost surely, 2^815123452 is an apocalyptic number.

It is an amenable number.

815123452 is an abundant number, since it is smaller than the sum of its proper divisors (884412932).

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

815123452 is a wasteful number, since it uses less digits than its factorization.

815123452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20170 (or 20168 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 815123452 is about 28550.3669328434. The cubic root of 815123452 is about 934.1310244498.

The spelling of 815123452 in words is "eight hundred fifteen million, one hundred twenty-three thousand, four hundred fifty-two".