261254620 has 48 divisors (see below), whose sum is σ = 619164000. Its totient is φ = 91723520.

The previous prime is 261254611. The next prime is 261254647. The reversal of 261254620 is 26452162.

It is a super-3 number, since 3×261254620³ (a number of 26 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 14095 + ... + 26854.

It is an arithmetic number, because the mean of its divisors is an integer number (12899250).

Almost surely, 2^261254620 is an apocalyptic number.

261254620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261254620 is an abundant number, since it is smaller than the sum of its proper divisors (357909380).

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

261254620 is a wasteful number, since it uses less digits than its factorization.

261254620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40998 (or 40996 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 261254620 is about 16163.3727915927. The cubic root of 261254620 is about 639.2754006311.

The spelling of 261254620 in words is "two hundred sixty-one million, two hundred fifty-four thousand, six hundred twenty".