1361249375 has 10 divisors (see below), whose sum is σ = 1701018000. Its totient is φ = 1088999000.

The previous prime is 1361249369. The next prime is 1361249377. The reversal of 1361249375 is 5739421631.

It is not a de Polignac number, because 1361249375 - 2¹⁰ = 1361248351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361249377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1088375 + ... + 1089624.

It is an arithmetic number, because the mean of its divisors is an integer number (170101800).

Almost surely, 2^1361249375 is an apocalyptic number.

1361249375 is a deficient number, since it is larger than the sum of its proper divisors (339768625).

1361249375 is an frugal number, since it uses more digits than its factorization.

1361249375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178019 (or 2178004 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 1361249375 is about 36895.1131587911. The cubic root of 1361249375 is about 1108.2708176370.

The spelling of 1361249375 in words is "one billion, three hundred sixty-one million, two hundred forty-nine thousand, three hundred seventy-five".