812143254 has 32 divisors (see below), whose sum is σ = 1757113344. Its totient is φ = 248764320.

The previous prime is 812143253. The next prime is 812143331. The reversal of 812143254 is 452341218.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812143253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5952 + ... + 40739.

It is an arithmetic number, because the mean of its divisors is an integer number (54909792).

Almost surely, 2^812143254 is an apocalyptic number.

812143254 is an abundant number, since it is smaller than the sum of its proper divisors (944970090).

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

812143254 is a wasteful number, since it uses less digits than its factorization.

812143254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46932.

The product of its digits is 7680, while the sum is 30.

The square root of 812143254 is about 28498.1272016250. The cubic root of 812143254 is about 932.9911991165.

The spelling of 812143254 in words is "eight hundred twelve million, one hundred forty-three thousand, two hundred fifty-four".