261025724 has 24 divisors (see below), whose sum is σ = 482417040. Its totient is φ = 123237504.

The previous prime is 261025703. The next prime is 261025727. The reversal of 261025724 is 427520162.

It is a happy number.

261025724 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

261025724 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261025727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18302 + ... + 29274.

It is an arithmetic number, because the mean of its divisors is an integer number (20100710).

Almost surely, 2^261025724 is an apocalyptic number.

It is an amenable number.

261025724 is a deficient number, since it is larger than the sum of its proper divisors (221391316).

261025724 is a wasteful number, since it uses less digits than its factorization.

With its successor (261025725) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (11309).

261025724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11309 (or 11307 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 261025724 is about 16156.2905396010. The cubic root of 261025724 is about 639.0886475222.

Adding to 261025724 its reverse (427520162), we get a palindrome (688545886).

The spelling of 261025724 in words is "two hundred sixty-one million, twenty-five thousand, seven hundred twenty-four".