281942742 has 8 divisors (see below), whose sum is σ = 563885496. Its totient is φ = 93980912.

The previous prime is 281942719. The next prime is 281942777. The reversal of 281942742 is 247249182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

281942742 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 281942742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23495223 + ... + 23495234.

It is an arithmetic number, because the mean of its divisors is an integer number (70485687).

Almost surely, 2^281942742 is an apocalyptic number.

281942742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

281942742 is a wasteful number, since it uses less digits than its factorization.

281942742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46990462.

The product of its digits is 64512, while the sum is 39.

The square root of 281942742 is about 16791.1507050589. The cubic root of 281942742 is about 655.7228327293.

The spelling of 281942742 in words is "two hundred eighty-one million, nine hundred forty-two thousand, seven hundred forty-two".