1245240345 has 16 divisors (see below), whose sum is σ = 1992876480. Its totient is φ = 663964224.

The previous prime is 1245240341. The next prime is 1245240377. The reversal of 1245240345 is 5430425421.

It is not a de Polignac number, because 1245240345 - 2² = 1245240341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245240341) 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, 75886 + ... + 90824.

It is an arithmetic number, because the mean of its divisors is an integer number (124554780).

Almost surely, 2^1245240345 is an apocalyptic number.

1245240345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1245240345 is a deficient number, since it is larger than the sum of its proper divisors (747636135).

1245240345 is a wasteful number, since it uses less digits than its factorization.

1245240345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20504.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1245240345 is about 35287.9631744310. The cubic root of 1245240345 is about 1075.8483571877.

Adding to 1245240345 its reverse (5430425421), we get a palindrome (6675665766).

The spelling of 1245240345 in words is "one billion, two hundred forty-five million, two hundred forty thousand, three hundred forty-five".