261125424 has 80 divisors (see below), whose sum is σ = 856611840. Its totient is φ = 74606400.

The previous prime is 261125401. The next prime is 261125437. The reversal of 261125424 is 424521162.

261125424 is a `hidden beast` number, since 2 + 6 + 112 + 542 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40152 + ... + 46199.

It is an arithmetic number, because the mean of its divisors is an integer number (10707648).

Almost surely, 2^261125424 is an apocalyptic number.

261125424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261125424 is an abundant number, since it is smaller than the sum of its proper divisors (595486416).

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

261125424 is a wasteful number, since it uses less digits than its factorization.

261125424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86375 (or 86363 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 261125424 is about 16159.3757305163. The cubic root of 261125424 is about 639.1700048007.

Adding to 261125424 its reverse (424521162), we get a palindrome (685646586).

The spelling of 261125424 in words is "two hundred sixty-one million, one hundred twenty-five thousand, four hundred twenty-four".