1361256025 has 24 divisors (see below), whose sum is σ = 1714890240. Its totient is φ = 1071733440.

The previous prime is 1361256023. The next prime is 1361256037. The reversal of 1361256025 is 5206521631.

It is not a de Polignac number, because 1361256025 - 2¹ = 1361256023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1361256023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 606856 + ... + 609094.

It is an arithmetic number, because the mean of its divisors is an integer number (71453760).

Almost surely, 2^1361256025 is an apocalyptic number.

It is an amenable number.

1361256025 is a deficient number, since it is larger than the sum of its proper divisors (353634215).

1361256025 is a wasteful number, since it uses less digits than its factorization.

1361256025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1361256025 is about 36895.2032790172. The cubic root of 1361256025 is about 1108.2726223490.

Adding to 1361256025 its reverse (5206521631), we get a palindrome (6567777656).

The spelling of 1361256025 in words is "one billion, three hundred sixty-one million, two hundred fifty-six thousand, twenty-five".