1361685247 has 4 divisors (see below), whose sum is σ = 1466430280. Its totient is φ = 1256940216.

The previous prime is 1361685239. The next prime is 1361685289. The reversal of 1361685247 is 7425861631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361685247 - 2³ = 1361685239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361685047) 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, 52372497 + ... + 52372522.

It is an arithmetic number, because the mean of its divisors is an integer number (366607570).

Almost surely, 2^1361685247 is an apocalyptic number.

1361685247 is a deficient number, since it is larger than the sum of its proper divisors (104745033).

1361685247 is a wasteful number, since it uses less digits than its factorization.

1361685247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104745032.

The product of its digits is 241920, while the sum is 43.

The square root of 1361685247 is about 36901.0195929598. The cubic root of 1361685247 is about 1108.3890944389.

The spelling of 1361685247 in words is "one billion, three hundred sixty-one million, six hundred eighty-five thousand, two hundred forty-seven".