142206397 has 4 divisors (see below), whose sum is σ = 144209376. Its totient is φ = 140203420.

The previous prime is 142206359. The next prime is 142206413. The reversal of 142206397 is 793602241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142206397 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 (142206497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001383 + ... + 1001524.

It is an arithmetic number, because the mean of its divisors is an integer number (36052344).

Almost surely, 2^142206397 is an apocalyptic number.

It is an amenable number.

142206397 is a deficient number, since it is larger than the sum of its proper divisors (2002979).

142206397 is an equidigital number, since it uses as much as digits as its factorization.

142206397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002978.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 142206397 is about 11925.0323689288. The cubic root of 142206397 is about 521.9629909220.

The spelling of 142206397 in words is "one hundred forty-two million, two hundred six thousand, three hundred ninety-seven".