681474142 has 4 divisors (see below), whose sum is σ = 1022211216. Its totient is φ = 340737070.

The previous prime is 681474139. The next prime is 681474151. The reversal of 681474142 is 241474186.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170368534 + ... + 170368537.

It is an arithmetic number, because the mean of its divisors is an integer number (255552804).

Almost surely, 2^681474142 is an apocalyptic number.

681474142 is a deficient number, since it is larger than the sum of its proper divisors (340737074).

681474142 is a wasteful number, since it uses less digits than its factorization.

681474142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340737073.

The product of its digits is 43008, while the sum is 37.

The square root of 681474142 is about 26105.0597011384. The cubic root of 681474142 is about 880.0009220032. Note that the first 3 decimals are identical.

The spelling of 681474142 in words is "six hundred eighty-one million, four hundred seventy-four thousand, one hundred forty-two".