142378997 has 8 divisors (see below), whose sum is σ = 146819232. Its totient is φ = 137970000.

The previous prime is 142378991. The next prime is 142379011. The reversal of 142378997 is 799873241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142378997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142378991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1622 + ... + 16952.

It is an arithmetic number, because the mean of its divisors is an integer number (18352404).

Almost surely, 2^142378997 is an apocalyptic number.

It is an amenable number.

142378997 is a deficient number, since it is larger than the sum of its proper divisors (4440235).

142378997 is a wasteful number, since it uses less digits than its factorization.

142378997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15619.

The product of its digits is 762048, while the sum is 50.

The square root of 142378997 is about 11932.2670519897. The cubic root of 142378997 is about 522.1740793823.

The spelling of 142378997 in words is "one hundred forty-two million, three hundred seventy-eight thousand, nine hundred ninety-seven".