142565261 has 2 divisors, whose sum is σ = 142565262. Its totient is φ = 142565260.

The previous prime is 142565257. The next prime is 142565279. The reversal of 142565261 is 162565241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100120036 + 42445225 = 10006^2 + 6515^2 .

It is a cyclic number.

It is not a de Polignac number, because 142565261 - 2² = 142565257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142565221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71282630 + 71282631.

It is an arithmetic number, because the mean of its divisors is an integer number (71282631).

Almost surely, 2^142565261 is an apocalyptic number.

It is an amenable number.

142565261 is a deficient number, since it is larger than the sum of its proper divisors (1).

142565261 is an equidigital number, since it uses as much as digits as its factorization.

142565261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 142565261 is about 11940.0695559113. The cubic root of 142565261 is about 522.4016875078.

The spelling of 142565261 in words is "one hundred forty-two million, five hundred sixty-five thousand, two hundred sixty-one".