261345200 has 30 divisors (see below), whose sum is σ = 627882804. Its totient is φ = 104537920.

The previous prime is 261345127. The next prime is 261345211. The reversal of 261345200 is 2543162.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 326282 + ... + 327081.

Almost surely, 2^261345200 is an apocalyptic number.

261345200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261345200 is an abundant number, since it is smaller than the sum of its proper divisors (366537604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261345200 is a wasteful number, since it uses less digits than its factorization.

261345200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653381 (or 653370 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 261345200 is about 16166.1745629571. The cubic root of 261345200 is about 639.3492734873.

Adding to 261345200 its reverse (2543162), we get a palindrome (263888362).

The spelling of 261345200 in words is "two hundred sixty-one million, three hundred forty-five thousand, two hundred".