261436124 has 24 divisors (see below), whose sum is σ = 502535040. Its totient is φ = 118453104.

The previous prime is 261436111. The next prime is 261436151. The reversal of 261436124 is 421634162.

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, 73034 + ... + 76529.

It is an arithmetic number, because the mean of its divisors is an integer number (20938960).

Almost surely, 2^261436124 is an apocalyptic number.

It is an amenable number.

261436124 is a deficient number, since it is larger than the sum of its proper divisors (241098916).

261436124 is a wasteful number, since it uses less digits than its factorization.

261436124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149609 (or 149607 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 261436124 is about 16168.9864864808. The cubic root of 261436124 is about 639.4234097294.

The spelling of 261436124 in words is "two hundred sixty-one million, four hundred thirty-six thousand, one hundred twenty-four".