261051426 has 24 divisors (see below), whose sum is σ = 590204160. Its totient is φ = 83233656.

The previous prime is 261051419. The next prime is 261051437. The reversal of 261051426 is 624150162.

261051426 is a `hidden beast` number, since 2 + 610 + 5 + 1 + 42 + 6 = 666.

261051426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261051426.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314866 + ... + 315693.

It is an arithmetic number, because the mean of its divisors is an integer number (24591840).

Almost surely, 2^261051426 is an apocalyptic number.

261051426 is an abundant number, since it is smaller than the sum of its proper divisors (329152734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261051426 is a wasteful number, since it uses less digits than its factorization.

261051426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630590 (or 630587 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 261051426 is about 16157.0859377550. The cubic root of 261051426 is about 639.1096228717.

The spelling of 261051426 in words is "two hundred sixty-one million, fifty-one thousand, four hundred twenty-six".