142400197 has 2 divisors, whose sum is σ = 142400198. Its totient is φ = 142400196.

The previous prime is 142400191. The next prime is 142400213. The reversal of 142400197 is 791004241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113337316 + 29062881 = 10646^2 + 5391^2 .

It is a cyclic number.

It is not a de Polignac number, because 142400197 - 2³ = 142400189 is a prime.

It is a super-2 number, since 2×142400197² = 40555632211277618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142400191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71200098 + 71200099.

It is an arithmetic number, because the mean of its divisors is an integer number (71200099).

Almost surely, 2^142400197 is an apocalyptic number.

It is an amenable number.

142400197 is a deficient number, since it is larger than the sum of its proper divisors (1).

142400197 is an equidigital number, since it uses as much as digits as its factorization.

142400197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 142400197 is about 11933.1553664569. The cubic root of 142400197 is about 522.1999950518.

The spelling of 142400197 in words is "one hundred forty-two million, four hundred thousand, one hundred ninety-seven".