261573046 has 8 divisors (see below), whose sum is σ = 448410960. Its totient is φ = 112102728.

The previous prime is 261573041. The next prime is 261573049. The reversal of 261573046 is 640375162.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261573041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9341881 + ... + 9341908.

It is an arithmetic number, because the mean of its divisors is an integer number (56051370).

Almost surely, 2^261573046 is an apocalyptic number.

261573046 is a deficient number, since it is larger than the sum of its proper divisors (186837914).

261573046 is a wasteful number, since it uses less digits than its factorization.

261573046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18683798.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 261573046 is about 16173.2200257092. The cubic root of 261573046 is about 639.5350187027.

The spelling of 261573046 in words is "two hundred sixty-one million, five hundred seventy-three thousand, forty-six".