261261033 has 16 divisors (see below), whose sum is σ = 390288576. Its totient is φ = 154059840.

The previous prime is 261261019. The next prime is 261261037. The reversal of 261261033 is 330162162.

It is a happy number.

It is not a de Polignac number, because 261261033 - 2⁶ = 261260969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261260994 and 261261012.

It is not an unprimeable number, because it can be changed into a prime (261261037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105766 + ... + 108207.

It is an arithmetic number, because the mean of its divisors is an integer number (24393036).

Almost surely, 2^261261033 is an apocalyptic number.

It is an amenable number.

261261033 is a deficient number, since it is larger than the sum of its proper divisors (129027543).

261261033 is a wasteful number, since it uses less digits than its factorization.

261261033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214024.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 261261033 is about 16163.5711710005. The cubic root of 261261033 is about 639.2806313387.

The spelling of 261261033 in words is "two hundred sixty-one million, two hundred sixty-one thousand, thirty-three".