811854142 has 64 divisors (see below), whose sum is σ = 1443536640. Its totient is φ = 338342400.

The previous prime is 811854107. The next prime is 811854143. The reversal of 811854142 is 241458118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 811854098 and 811854107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811854143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4485292 + ... + 4485472.

It is an arithmetic number, because the mean of its divisors is an integer number (22555260).

Almost surely, 2^811854142 is an apocalyptic number.

811854142 is a deficient number, since it is larger than the sum of its proper divisors (631682498).

811854142 is a wasteful number, since it uses less digits than its factorization.

811854142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its digits is 10240, while the sum is 34.

The square root of 811854142 is about 28493.0542764373. The cubic root of 811854142 is about 932.8804752328.

The spelling of 811854142 in words is "eight hundred eleven million, eight hundred fifty-four thousand, one hundred forty-two".