1245537705 has 16 divisors (see below), whose sum is σ = 2022606144. Its totient is φ = 654371520.

The previous prime is 1245537611. The next prime is 1245537707. The reversal of 1245537705 is 5077355421.

It is a happy number.

It is not a de Polignac number, because 1245537705 - 2¹² = 1245533609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245537707) 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, 618666 + ... + 620675.

It is an arithmetic number, because the mean of its divisors is an integer number (126412884).

Almost surely, 2^1245537705 is an apocalyptic number.

1245537705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1245537705 is a deficient number, since it is larger than the sum of its proper divisors (777068439).

1245537705 is a wasteful number, since it uses less digits than its factorization.

1245537705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239416.

The product of its (nonzero) digits is 147000, while the sum is 39.

The square root of 1245537705 is about 35292.1762576353. The cubic root of 1245537705 is about 1075.9339869236.

The spelling of 1245537705 in words is "one billion, two hundred forty-five million, five hundred thirty-seven thousand, seven hundred five".