261207404 has 6 divisors (see below), whose sum is σ = 457112964. Its totient is φ = 130603700.

The previous prime is 261207371. The next prime is 261207407. The reversal of 261207404 is 404702162.

261207404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261207407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32650922 + ... + 32650929.

It is an arithmetic number, because the mean of its divisors is an integer number (76185494).

Almost surely, 2^261207404 is an apocalyptic number.

It is an amenable number.

261207404 is a deficient number, since it is larger than the sum of its proper divisors (195905560).

261207404 is a wasteful number, since it uses less digits than its factorization.

261207404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65301855 (or 65301853 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 261207404 is about 16161.9121393479. The cubic root of 261207404 is about 639.2368866763.

Adding to 261207404 its reverse (404702162), we get a palindrome (665909566).

The spelling of 261207404 in words is "two hundred sixty-one million, two hundred seven thousand, four hundred four".