261003375 has 24 divisors (see below), whose sum is σ = 470504112. Its totient is φ = 139201200.

The previous prime is 261003373. The next prime is 261003401. The reversal of 261003375 is 573300162.

It is a happy number.

It is not a de Polignac number, because 261003375 - 2¹ = 261003373 is a prime.

It is a super-2 number, since 2×261003375² = 136245523522781250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261003373) 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 23 ways as a sum of consecutive naturals, for example, 114877 + ... + 117126.

It is an arithmetic number, because the mean of its divisors is an integer number (19604338).

Almost surely, 2^261003375 is an apocalyptic number.

261003375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261003375 is a deficient number, since it is larger than the sum of its proper divisors (209500737).

261003375 is a wasteful number, since it uses less digits than its factorization.

261003375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232024 (or 232011 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 261003375 is about 16155.5988746936. The cubic root of 261003375 is about 639.0704074300.

The spelling of 261003375 in words is "two hundred sixty-one million, three thousand, three hundred seventy-five".