1265370901 has 2 divisors, whose sum is σ = 1265370902. Its totient is φ = 1265370900.

The previous prime is 1265370871. The next prime is 1265370913. The reversal of 1265370901 is 1090735621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207215025 + 58155876 = 34745^2 + 7626^2 .

It is an emirp because it is prime and its reverse (1090735621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265370901 - 2¹⁵ = 1265338133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265370961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632685450 + 632685451.

It is an arithmetic number, because the mean of its divisors is an integer number (632685451).

Almost surely, 2^1265370901 is an apocalyptic number.

It is an amenable number.

1265370901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265370901 is an equidigital number, since it uses as much as digits as its factorization.

1265370901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 1265370901 is about 35572.0522461103. The cubic root of 1265370901 is about 1081.6147829252.

The spelling of 1265370901 in words is "one billion, two hundred sixty-five million, three hundred seventy thousand, nine hundred one".