261122403 has 8 divisors (see below), whose sum is σ = 349986816. Its totient is φ = 173169800.

The previous prime is 261122371. The next prime is 261122419. The reversal of 261122403 is 304221162.

261122403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261122403 - 2⁵ = 261122371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261122403.

It is not an unprimeable number, because it can be changed into a prime (261122423) 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, 227283 + ... + 228428.

It is an arithmetic number, because the mean of its divisors is an integer number (43748352).

Almost surely, 2^261122403 is an apocalyptic number.

261122403 is a deficient number, since it is larger than the sum of its proper divisors (88864413).

261122403 is a wasteful number, since it uses less digits than its factorization.

261122403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455905.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 261122403 is about 16159.2822551003. The cubic root of 261122403 is about 639.1675399060.

Adding to 261122403 its reverse (304221162), we get a palindrome (565343565).

The spelling of 261122403 in words is "two hundred sixty-one million, one hundred twenty-two thousand, four hundred three".