1265402345 has 16 divisors (see below), whose sum is σ = 1536288768. Its totient is φ = 1000481280.

The previous prime is 1265402297. The next prime is 1265402351. The reversal of 1265402345 is 5432045621.

It is not a de Polignac number, because 1265402345 - 2¹⁰ = 1265401321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469592 + ... + 472278.

It is an arithmetic number, because the mean of its divisors is an integer number (96018048).

Almost surely, 2^1265402345 is an apocalyptic number.

It is an amenable number.

1265402345 is a deficient number, since it is larger than the sum of its proper divisors (270886423).

1265402345 is an equidigital number, since it uses as much as digits as its factorization.

1265402345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1265402345 is about 35572.4942195512. The cubic root of 1265402345 is about 1081.6237420938.

Adding to 1265402345 its reverse (5432045621), we get a palindrome (6697447966).

The spelling of 1265402345 in words is "one billion, two hundred sixty-five million, four hundred two thousand, three hundred forty-five".