142771394 has 8 divisors (see below), whose sum is σ = 214210560. Its totient is φ = 71367876.

The previous prime is 142771381. The next prime is 142771403. The reversal of 142771394 is 493177241.

It is a happy number.

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

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, 6287 + ... + 18029.

It is an arithmetic number, because the mean of its divisors is an integer number (26776320).

Almost surely, 2^142771394 is an apocalyptic number.

142771394 is a deficient number, since it is larger than the sum of its proper divisors (71439166).

142771394 is a wasteful number, since it uses less digits than its factorization.

142771394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17824.

The product of its digits is 42336, while the sum is 38.

The square root of 142771394 is about 11948.6984228409. The cubic root of 142771394 is about 522.6533438797.

The spelling of 142771394 in words is "one hundred forty-two million, seven hundred seventy-one thousand, three hundred ninety-four".