812142419 has 16 divisors (see below), whose sum is σ = 937854720. Its totient is φ = 696262560.

The previous prime is 812142407. The next prime is 812142427. The reversal of 812142419 is 914241218.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812142419 is a prime.

It is a super-2 number, since 2×812142419² = 1319150617478343122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812142449) 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, 15887 + ... + 43320.

It is an arithmetic number, because the mean of its divisors is an integer number (58615920).

Almost surely, 2^812142419 is an apocalyptic number.

812142419 is a deficient number, since it is larger than the sum of its proper divisors (125712301).

812142419 is a wasteful number, since it uses less digits than its factorization.

812142419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59290.

The product of its digits is 4608, while the sum is 32.

The square root of 812142419 is about 28498.1125515358. The cubic root of 812142419 is about 932.9908793667.

The spelling of 812142419 in words is "eight hundred twelve million, one hundred forty-two thousand, four hundred nineteen".