261245432 has 64 divisors (see below), whose sum is σ = 587581440. Its totient is φ = 106531200.

The previous prime is 261245429. The next prime is 261245461. The reversal of 261245432 is 234542162.

It is a junction number, because it is equal to n+sod(n) for n = 261245395 and 261245404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104663 + ... + 107129.

It is an arithmetic number, because the mean of its divisors is an integer number (9180960).

Almost surely, 2^261245432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261245432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293790720).

261245432 is an abundant number, since it is smaller than the sum of its proper divisors (326336008).

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

261245432 is a wasteful number, since it uses less digits than its factorization.

261245432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572 (or 2568 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 261245432 is about 16163.0885662363. The cubic root of 261245432 is about 639.2679063697.

Adding to 261245432 its reverse (234542162), we get a palindrome (495787594).

The spelling of 261245432 in words is "two hundred sixty-one million, two hundred forty-five thousand, four hundred thirty-two".