261147340 has 12 divisors (see below), whose sum is σ = 548409456. Its totient is φ = 104458928.

The previous prime is 261147311. The next prime is 261147347. The reversal of 261147340 is 43741162.

261147340 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

261147340 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 261147299 and 261147308.

It is not an unprimeable number, because it can be changed into a prime (261147347) 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, 6528664 + ... + 6528703.

It is an arithmetic number, because the mean of its divisors is an integer number (45700788).

Almost surely, 2^261147340 is an apocalyptic number.

261147340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261147340 is an abundant number, since it is smaller than the sum of its proper divisors (287262116).

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

261147340 is a wasteful number, since it uses less digits than its factorization.

261147340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13057376 (or 13057374 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 261147340 is about 16160.0538365440. The cubic root of 261147340 is about 639.1878859371.

The spelling of 261147340 in words is "two hundred sixty-one million, one hundred forty-seven thousand, three hundred forty".