1361909725 has 12 divisors (see below), whose sum is σ = 1842292800. Its totient is φ = 990479600.

The previous prime is 1361909723. The next prime is 1361909743. The reversal of 1361909725 is 5279091631.

It is not a de Polignac number, because 1361909725 - 2¹ = 1361909723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361909723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2475925 + ... + 2476474.

It is an arithmetic number, because the mean of its divisors is an integer number (153524400).

Almost surely, 2^1361909725 is an apocalyptic number.

It is an amenable number.

1361909725 is a deficient number, since it is larger than the sum of its proper divisors (480383075).

1361909725 is a wasteful number, since it uses less digits than its factorization.

1361909725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952420 (or 4952415 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 1361909725 is about 36904.0610908881. The cubic root of 1361909725 is about 1108.4499982091.

The spelling of 1361909725 in words is "one billion, three hundred sixty-one million, nine hundred nine thousand, seven hundred twenty-five".