261473641 has 8 divisors (see below), whose sum is σ = 307185984. Its totient is φ = 219418320.

The previous prime is 261473629. The next prime is 261473689. The reversal of 261473641 is 146374162.

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

It is not a de Polignac number, because 261473641 - 2⁹ = 261473129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261473597 and 261473606.

It is not an unprimeable number, because it can be changed into a prime (261473621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914101 + ... + 914386.

It is an arithmetic number, because the mean of its divisors is an integer number (38398248).

Almost surely, 2^261473641 is an apocalyptic number.

It is an amenable number.

261473641 is a deficient number, since it is larger than the sum of its proper divisors (45712343).

261473641 is a wasteful number, since it uses less digits than its factorization.

261473641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828511.

The product of its digits is 24192, while the sum is 34.

The square root of 261473641 is about 16170.1465979749. The cubic root of 261473641 is about 639.4539947665.

The spelling of 261473641 in words is "two hundred sixty-one million, four hundred seventy-three thousand, six hundred forty-one".