142207897 has 16 divisors (see below), whose sum is σ = 156396240. Its totient is φ = 128505600.

The previous prime is 142207859. The next prime is 142207937. The reversal of 142207897 is 798702241.

It can be written as a sum of positive squares in 8 ways, for example, as 62980096 + 79227801 = 7936^2 + 8901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142207897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142207847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308247 + ... + 308707.

It is an arithmetic number, because the mean of its divisors is an integer number (9774765).

Almost surely, 2^142207897 is an apocalyptic number.

It is an amenable number.

142207897 is a deficient number, since it is larger than the sum of its proper divisors (14188343).

142207897 is a wasteful number, since it uses less digits than its factorization.

142207897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 142207897 is about 11925.0952616740. The cubic root of 142207897 is about 521.9648261459.

The spelling of 142207897 in words is "one hundred forty-two million, two hundred seven thousand, eight hundred ninety-seven".