142012513261 has 2 divisors, whose sum is σ = 142012513262. Its totient is φ = 142012513260.

The previous prime is 142012513211. The next prime is 142012513303. The reversal of 142012513261 is 162315210241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134235037161 + 7777476100 = 366381^2 + 88190^2 .

It is a cyclic number.

It is not a de Polignac number, because 142012513261 - 2³¹ = 139865029613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142012513211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71006256630 + 71006256631.

It is an arithmetic number, because the mean of its divisors is an integer number (71006256631).

Almost surely, 2^142012513261 is an apocalyptic number.

It is an amenable number.

142012513261 is a deficient number, since it is larger than the sum of its proper divisors (1).

142012513261 is an equidigital number, since it uses as much as digits as its factorization.

142012513261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 142012513261 in words is "one hundred forty-two billion, twelve million, five hundred thirteen thousand, two hundred sixty-one".