261173248 has 52 divisors (see below), whose sum is σ = 596960080. Its totient is φ = 111919104.

The previous prime is 261173243. The next prime is 261173273. The reversal of 261173248 is 842371162.

It is a super-2 number, since 2×261173248² = 136422930941739008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261173243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24118 + ... + 33226.

Almost surely, 2^261173248 is an apocalyptic number.

261173248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261173248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298480040).

261173248 is an abundant number, since it is smaller than the sum of its proper divisors (335786832).

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

261173248 is an frugal number, since it uses more digits than its factorization.

261173248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9140 (or 9118 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 261173248 is about 16160.8554229038. The cubic root of 261173248 is about 639.2090228326.

The spelling of 261173248 in words is "two hundred sixty-one million, one hundred seventy-three thousand, two hundred forty-eight".