261450342 has 80 divisors (see below), whose sum is σ = 613324800. Its totient is φ = 83144880.

The previous prime is 261450313. The next prime is 261450347. The reversal of 261450342 is 243054162.

261450342 is a `hidden beast` number, since 2 + 614 + 5 + 0 + 3 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261450347) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 396409 + ... + 397067.

It is an arithmetic number, because the mean of its divisors is an integer number (7666560).

Almost surely, 2^261450342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261450342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306662400).

261450342 is an abundant number, since it is smaller than the sum of its proper divisors (351874458).

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

261450342 is a wasteful number, since it uses less digits than its factorization.

261450342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 261450342 is about 16169.4261493722. The cubic root of 261450342 is about 639.4350010340.

The spelling of 261450342 in words is "two hundred sixty-one million, four hundred fifty thousand, three hundred forty-two".