261402433 has 8 divisors (see below), whose sum is σ = 270717480. Its totient is φ = 252107520.

The previous prime is 261402431. The next prime is 261402457. The reversal of 261402433 is 334204162.

It can be written as a sum of positive squares in 4 ways, for example, as 174689089 + 86713344 = 13217^2 + 9312^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261402433 - 2¹ = 261402431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261402398 and 261402407.

It is not an unprimeable number, because it can be changed into a prime (261402431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24393 + ... + 33433.

It is an arithmetic number, because the mean of its divisors is an integer number (33839685).

Almost surely, 2^261402433 is an apocalyptic number.

It is an amenable number.

261402433 is a deficient number, since it is larger than the sum of its proper divisors (9315047).

261402433 is an equidigital number, since it uses as much as digits as its factorization.

261402433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10067.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 261402433 is about 16167.9446127206. The cubic root of 261402433 is about 639.3959412740.

Adding to 261402433 its reverse (334204162), we get a palindrome (595606595).

The spelling of 261402433 in words is "two hundred sixty-one million, four hundred two thousand, four hundred thirty-three".