261419020 has 24 divisors (see below), whose sum is σ = 549579744. Its totient is φ = 104453376.

The previous prime is 261419009. The next prime is 261419051. The reversal of 261419020 is 20914162.

261419020 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

261419020 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012 + ... + 26308.

It is an arithmetic number, because the mean of its divisors is an integer number (22899156).

Almost surely, 2^261419020 is an apocalyptic number.

261419020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261419020 is an abundant number, since it is smaller than the sum of its proper divisors (288160724).

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

261419020 is a wasteful number, since it uses less digits than its factorization.

261419020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289 (or 14287 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 261419020 is about 16168.4575640350. The cubic root of 261419020 is about 639.4094650402.

The spelling of 261419020 in words is "two hundred sixty-one million, four hundred nineteen thousand, twenty".