261120630 has 32 divisors (see below), whose sum is σ = 631273824. Its totient is φ = 69122816.

The previous prime is 261120593. The next prime is 261120649. The reversal of 261120630 is 36021162.

It is a happy number.

261120630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261120597 and 261120606.

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, 27657 + ... + 35876.

It is an arithmetic number, because the mean of its divisors is an integer number (19727307).

Almost surely, 2^261120630 is an apocalyptic number.

261120630 is an abundant number, since it is smaller than the sum of its proper divisors (370153194).

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

261120630 is a wasteful number, since it uses less digits than its factorization.

261120630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63680.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 261120630 is about 16159.2273948973. The cubic root of 261120630 is about 639.1660932707.

Adding to 261120630 its reverse (36021162), we get a palindrome (297141792).

The spelling of 261120630 in words is "two hundred sixty-one million, one hundred twenty thousand, six hundred thirty".