142155197 has 2 divisors, whose sum is σ = 142155198. Its totient is φ = 142155196.

The previous prime is 142155133. The next prime is 142155217. The reversal of 142155197 is 791551241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135047641 + 7107556 = 11621^2 + 2666^2 .

It is a cyclic number.

It is not a de Polignac number, because 142155197 - 2⁶ = 142155133 is a prime.

It is a super-3 number, since 3×142155197³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is equal to p_8026928 and since 142155197 and 8026928 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142155127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71077598 + 71077599.

It is an arithmetic number, because the mean of its divisors is an integer number (71077599).

Almost surely, 2^142155197 is an apocalyptic number.

It is an amenable number.

142155197 is a deficient number, since it is larger than the sum of its proper divisors (1).

142155197 is an equidigital number, since it uses as much as digits as its factorization.

142155197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 35.

The square root of 142155197 is about 11922.8854309685. The cubic root of 142155197 is about 521.9003408733.

The spelling of 142155197 in words is "one hundred forty-two million, one hundred fifty-five thousand, one hundred ninety-seven".