275639725 has 12 divisors (see below), whose sum is σ = 349066944. Its totient is φ = 215819120.

The previous prime is 275639723. The next prime is 275639729. The reversal of 275639725 is 527936572.

It is not a de Polignac number, because 275639725 - 2¹ = 275639723 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 (275639723) 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, 116119 + ... + 118468.

It is an arithmetic number, because the mean of its divisors is an integer number (29088912).

Almost surely, 2^275639725 is an apocalyptic number.

275639725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

275639725 is a deficient number, since it is larger than the sum of its proper divisors (73427219).

275639725 is a wasteful number, since it uses less digits than its factorization.

275639725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234644 (or 234639 counting only the distinct ones).

The product of its digits is 793800, while the sum is 46.

The square root of 275639725 is about 16602.4011817568. The cubic root of 275639725 is about 650.7995879873.

It can be divided in two parts, 275 and 639725, that added together give a square (640000 = 800²).

The spelling of 275639725 in words is "two hundred seventy-five million, six hundred thirty-nine thousand, seven hundred twenty-five".