261201026 has 16 divisors (see below), whose sum is σ = 395551296. Its totient is φ = 129356496.

The previous prime is 261201011. The next prime is 261201029. The reversal of 261201026 is 620102162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261200989 and 261201007.

It is not an unprimeable number, because it can be changed into a prime (261201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104645 + ... + 107111.

It is an arithmetic number, because the mean of its divisors is an integer number (24721956).

Almost surely, 2^261201026 is an apocalyptic number.

261201026 is a deficient number, since it is larger than the sum of its proper divisors (134350270).

261201026 is a wasteful number, since it uses less digits than its factorization.

261201026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 261201026 is about 16161.7148223819. The cubic root of 261201026 is about 639.2316838043.

Adding to 261201026 its reverse (620102162), we get a palindrome (881303188).

The spelling of 261201026 in words is "two hundred sixty-one million, two hundred one thousand, twenty-six".