781342 has 4 divisors (see below), whose sum is σ = 1172016. Its totient is φ = 390670.

The previous prime is 781327. The next prime is 781351. The reversal of 781342 is 243187.

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

It is a super-2 number, since 2×781342² = 1220990641928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

781342 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195334 + ... + 195337.

It is an arithmetic number, because the mean of its divisors is an integer number (293004).

2⁷⁸¹³⁴² is an apocalyptic number.

781342 is a deficient number, since it is larger than the sum of its proper divisors (390674).

781342 is a wasteful number, since it uses less digits than its factorization.

781342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390673.

The product of its digits is 1344, while the sum is 25.

The square root of 781342 is about 883.9355180102. The cubic root of 781342 is about 92.1044025870.

The spelling of 781342 in words is "seven hundred eighty-one thousand, three hundred forty-two".