261601442 has 8 divisors (see below), whose sum is σ = 392472000. Its totient is φ = 130777444.

The previous prime is 261601409. The next prime is 261601451. The reversal of 261601442 is 244106162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12059 + ... + 25857.

It is an arithmetic number, because the mean of its divisors is an integer number (49059000).

Almost surely, 2^261601442 is an apocalyptic number.

261601442 is a deficient number, since it is larger than the sum of its proper divisors (130870558).

261601442 is a wasteful number, since it uses less digits than its factorization.

261601442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23280.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 261601442 is about 16174.0978728336. The cubic root of 261601442 is about 639.5581602045.

The spelling of 261601442 in words is "two hundred sixty-one million, six hundred one thousand, four hundred forty-two".