1265942353 has 16 divisors (see below), whose sum is σ = 1373798160. Its totient is φ = 1159623936.

The previous prime is 1265942351. The next prime is 1265942371. The reversal of 1265942353 is 3532495621.

It can be written as a sum of positive squares in 8 ways, for example, as 868657729 + 397284624 = 29473^2 + 19932^2 .

It is not a de Polignac number, because 1265942353 - 2¹ = 1265942351 is a prime.

It is a super-2 number, since 2×1265942353² = 3205220082238353218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265942351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140963 + ... + 1142071.

It is an arithmetic number, because the mean of its divisors is an integer number (85862385).

Almost surely, 2^1265942353 is an apocalyptic number.

1265942353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1265942353 is a deficient number, since it is larger than the sum of its proper divisors (107855807).

1265942353 is a wasteful number, since it uses less digits than its factorization.

1265942353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716.

The product of its digits is 194400, while the sum is 40.

The square root of 1265942353 is about 35580.0836564503. The cubic root of 1265942353 is about 1081.7775804915. Note that the first 3 decimals are identical.

The spelling of 1265942353 in words is "one billion, two hundred sixty-five million, nine hundred forty-two thousand, three hundred fifty-three".