261204034 has 48 divisors (see below), whose sum is σ = 494258112. Its totient is φ = 101335104.

The previous prime is 261204029. The next prime is 261204037. The reversal of 261204034 is 430402162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261203996 and 261204014.

It is not an unprimeable number, because it can be changed into a prime (261204037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124357 + ... + 126439.

It is an arithmetic number, because the mean of its divisors is an integer number (10297044).

Almost surely, 2^261204034 is an apocalyptic number.

261204034 is a deficient number, since it is larger than the sum of its proper divisors (233054078).

261204034 is a wasteful number, since it uses less digits than its factorization.

261204034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 261204034 is about 16161.8078815459. The cubic root of 261204034 is about 639.2341375996.

Adding to 261204034 its reverse (430402162), we get a palindrome (691606196).

The spelling of 261204034 in words is "two hundred sixty-one million, two hundred four thousand, thirty-four".