261454740 has 24 divisors (see below), whose sum is σ = 732073440. Its totient is φ = 69721248.

The previous prime is 261454733. The next prime is 261454751. The reversal of 261454740 is 47454162.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2178730 + ... + 2178849.

It is an arithmetic number, because the mean of its divisors is an integer number (30503060).

Almost surely, 2^261454740 is an apocalyptic number.

261454740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261454740 is an abundant number, since it is smaller than the sum of its proper divisors (470618700).

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

261454740 is a wasteful number, since it uses less digits than its factorization.

261454740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357591 (or 4357589 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 261454740 is about 16169.5621462054. The cubic root of 261454740 is about 639.4385864432.

The spelling of 261454740 in words is "two hundred sixty-one million, four hundred fifty-four thousand, seven hundred forty".