261615126 has 16 divisors (see below), whose sum is σ = 525579264. Its totient is φ = 86813544.

The previous prime is 261615083. The next prime is 261615173. The reversal of 261615126 is 621516162.

It is a junction number, because it is equal to n+sod(n) for n = 261615093 and 261615102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96426 + ... + 99101.

It is an arithmetic number, because the mean of its divisors is an integer number (32848704).

Almost surely, 2^261615126 is an apocalyptic number.

261615126 is an abundant number, since it is smaller than the sum of its proper divisors (263964138).

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

261615126 is a wasteful number, since it uses less digits than its factorization.

261615126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195755.

The product of its digits is 4320, while the sum is 30.

The square root of 261615126 is about 16174.5208893494. The cubic root of 261615126 is about 639.5693114698.

The spelling of 261615126 in words is "two hundred sixty-one million, six hundred fifteen thousand, one hundred twenty-six".