261420030 has 24 divisors (see below), whose sum is σ = 679692312. Its totient is φ = 69711984.

The previous prime is 261419989. The next prime is 261420043. The reversal of 261420030 is 30024162.

It is a happy number.

261420030 is a `hidden beast` number, since 2 + 614 + 20 + 0 + 30 = 666.

261420030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 261419985 and 261420012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1452244 + ... + 1452423.

It is an arithmetic number, because the mean of its divisors is an integer number (28320513).

Almost surely, 2^261420030 is an apocalyptic number.

261420030 is an abundant number, since it is smaller than the sum of its proper divisors (418272282).

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

261420030 is a wasteful number, since it uses less digits than its factorization.

261420030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904680 (or 2904677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 261420030 is about 16168.4887976582. The cubic root of 261420030 is about 639.4102884982.

Adding to 261420030 its reverse (30024162), we get a palindrome (291444192).

The spelling of 261420030 in words is "two hundred sixty-one million, four hundred twenty thousand, thirty".