261432742 has 16 divisors (see below), whose sum is σ = 413103600. Its totient is φ = 123742080.

The previous prime is 261432719. The next prime is 261432781. The reversal of 261432742 is 247234162.

It is a happy number.

261432742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94434 + ... + 97162.

It is an arithmetic number, because the mean of its divisors is an integer number (25818975).

Almost surely, 2^261432742 is an apocalyptic number.

261432742 is a deficient number, since it is larger than the sum of its proper divisors (151670858).

261432742 is a wasteful number, since it uses less digits than its factorization.

261432742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271.

The product of its digits is 16128, while the sum is 31.

The square root of 261432742 is about 16168.8819032115. The cubic root of 261432742 is about 639.4206524730.

The spelling of 261432742 in words is "two hundred sixty-one million, four hundred thirty-two thousand, seven hundred forty-two".