1245755647 has 8 divisors (see below), whose sum is σ = 1301202144. Its totient is φ = 1190416128.

The previous prime is 1245755629. The next prime is 1245755663. The reversal of 1245755647 is 7465575421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245755647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245755597 and 1245755606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245755347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2458 + ... + 49975.

It is an arithmetic number, because the mean of its divisors is an integer number (162650268).

Almost surely, 2^1245755647 is an apocalyptic number.

1245755647 is a deficient number, since it is larger than the sum of its proper divisors (55446497).

1245755647 is a wasteful number, since it uses less digits than its factorization.

1245755647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53489.

The product of its digits is 1176000, while the sum is 46.

The square root of 1245755647 is about 35295.2638040857. The cubic root of 1245755647 is about 1075.9967382769.

The spelling of 1245755647 in words is "one billion, two hundred forty-five million, seven hundred fifty-five thousand, six hundred forty-seven".