261342473 has 8 divisors (see below), whose sum is σ = 314397120. Its totient is φ = 212217840.

The previous prime is 261342467. The next prime is 261342503. The reversal of 261342473 is 374243162.

261342473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 261342473 - 2¹⁰ = 261341449 is a prime.

It is a super-3 number, since 3×261342473³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261342413) 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, 982358 + ... + 982623.

It is an arithmetic number, because the mean of its divisors is an integer number (39299640).

Almost surely, 2^261342473 is an apocalyptic number.

It is an amenable number.

261342473 is a deficient number, since it is larger than the sum of its proper divisors (53054647).

261342473 is a wasteful number, since it uses less digits than its factorization.

261342473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965007.

The product of its digits is 24192, while the sum is 32.

The square root of 261342473 is about 16166.0902199635. The cubic root of 261342473 is about 639.3470497215.

The spelling of 261342473 in words is "two hundred sixty-one million, three hundred forty-two thousand, four hundred seventy-three".