78274142 has 4 divisors (see below), whose sum is σ = 117411216. Its totient is φ = 39137070.

The previous prime is 78274123. The next prime is 78274159. The reversal of 78274142 is 24147287.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24147287 = 653 ⋅36979.

It is a super-2 number, since 2×78274142² = 12253682611672328, which contains 22 as substring.

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, 19568534 + ... + 19568537.

It is an arithmetic number, because the mean of its divisors is an integer number (29352804).

Almost surely, 2^78274142 is an apocalyptic number.

78274142 is a deficient number, since it is larger than the sum of its proper divisors (39137074).

78274142 is a wasteful number, since it uses less digits than its factorization.

78274142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39137073.

The product of its digits is 25088, while the sum is 35.

The square root of 78274142 is about 8847.2674877614. The cubic root of 78274142 is about 427.7658449299.

The spelling of 78274142 in words is "seventy-eight million, two hundred seventy-four thousand, one hundred forty-two".