261847455 has 16 divisors (see below), whose sum is σ = 441006720. Its totient is φ = 132301728.

The previous prime is 261847429. The next prime is 261847463. The reversal of 261847455 is 554748162.

It is a happy number.

It is not a de Polignac number, because 261847455 - 2⁹ = 261846943 is a prime.

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, 459097 + ... + 459666.

It is an arithmetic number, because the mean of its divisors is an integer number (27562920).

Almost surely, 2^261847455 is an apocalyptic number.

261847455 is a deficient number, since it is larger than the sum of its proper divisors (179159265).

261847455 is a wasteful number, since it uses less digits than its factorization.

261847455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918790.

The product of its digits is 268800, while the sum is 42.

The square root of 261847455 is about 16181.7012393629. The cubic root of 261847455 is about 639.7585800045.

It can be divided in two parts, 26 and 1847455, that added together give a palindrome (1847481).

The spelling of 261847455 in words is "two hundred sixty-one million, eight hundred forty-seven thousand, four hundred fifty-five".