1250265125261 has 2 divisors, whose sum is σ = 1250265125262. Its totient is φ = 1250265125260.

The previous prime is 1250265125203. The next prime is 1250265125267. The reversal of 1250265125261 is 1625215620521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223249272036 + 27015853225 = 1106006^2 + 164365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250265125261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250265125267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625132562630 + 625132562631.

It is an arithmetic number, because the mean of its divisors is an integer number (625132562631).

Almost surely, 2^{1250265125261} is an apocalyptic number.

It is an amenable number.

1250265125261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250265125261 is an equidigital number, since it uses as much as digits as its factorization.

1250265125261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 1250265125261 in words is "one trillion, two hundred fifty billion, two hundred sixty-five million, one hundred twenty-five thousand, two hundred sixty-one".