261082450 has 12 divisors (see below), whose sum is σ = 485613450. Its totient is φ = 104432960.

The previous prime is 261082433. The next prime is 261082483. The reversal of 261082450 is 54280162.

It can be written as a sum of positive squares in 3 ways, for example, as 162894169 + 98188281 = 12763^2 + 9909^2 .

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, 2610775 + ... + 2610874.

Almost surely, 2^261082450 is an apocalyptic number.

261082450 is a deficient number, since it is larger than the sum of its proper divisors (224531000).

261082450 is a wasteful number, since it uses less digits than its factorization.

261082450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221661 (or 5221656 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 261082450 is about 16158.0459833484. The cubic root of 261082450 is about 639.1349396606.

The spelling of 261082450 in words is "two hundred sixty-one million, eighty-two thousand, four hundred fifty".