261442434 has 32 divisors (see below), whose sum is σ = 571380480. Its totient is φ = 79091600.

The previous prime is 261442421. The next prime is 261442469. The reversal of 261442434 is 434244162.

261442434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40489 + ... + 46499.

It is an arithmetic number, because the mean of its divisors is an integer number (17855640).

Almost surely, 2^261442434 is an apocalyptic number.

261442434 is an abundant number, since it is smaller than the sum of its proper divisors (309938046).

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

261442434 is a wasteful number, since it uses less digits than its factorization.

261442434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686.

The product of its digits is 18432, while the sum is 30.

The square root of 261442434 is about 16169.1816119431. The cubic root of 261442434 is about 639.4285540443.

Adding to 261442434 its reverse (434244162), we get a palindrome (695686596).

The spelling of 261442434 in words is "two hundred sixty-one million, four hundred forty-two thousand, four hundred thirty-four".