1245345345 has 12 divisors (see below), whose sum is σ = 2158598676. Its totient is φ = 664184160.

The previous prime is 1245345331. The next prime is 1245345377. The reversal of 1245345345 is 5435435421.

It can be written as a sum of positive squares in 2 ways, for example, as 705061809 + 540283536 = 26553^2 + 23244^2 .

It is not a de Polignac number, because 1245345345 - 2⁵ = 1245345313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13837126 + ... + 13837215.

It is an arithmetic number, because the mean of its divisors is an integer number (179883223).

Almost surely, 2^1245345345 is an apocalyptic number.

1245345345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1245345345 is a deficient number, since it is larger than the sum of its proper divisors (913253331).

1245345345 is a wasteful number, since it uses less digits than its factorization.

1245345345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27674352 (or 27674349 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The square root of 1245345345 is about 35289.4509025006. The cubic root of 1245345345 is about 1075.8785952331.

The spelling of 1245345345 in words is "one billion, two hundred forty-five million, three hundred forty-five thousand, three hundred forty-five".