1245913566 has 8 divisors (see below), whose sum is σ = 2491827144. Its totient is φ = 415304520.

The previous prime is 1245913517. The next prime is 1245913567. The reversal of 1245913566 is 6653195421.

It is a sphenic number, since it is the product of 3 distinct primes.

1245913566 is an admirable number.

It is a super-2 number, since 2×1245913566² = 3104601227885672712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245913567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103826125 + ... + 103826136.

It is an arithmetic number, because the mean of its divisors is an integer number (311478393).

Almost surely, 2^1245913566 is an apocalyptic number.

1245913566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245913566 is a wasteful number, since it uses less digits than its factorization.

1245913566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207652266.

The product of its digits is 194400, while the sum is 42.

The square root of 1245913566 is about 35297.5008463772. The cubic root of 1245913566 is about 1076.0422028241.

The spelling of 1245913566 in words is "one billion, two hundred forty-five million, nine hundred thirteen thousand, five hundred sixty-six".