261442526 has 4 divisors (see below), whose sum is σ = 392163792. Its totient is φ = 130721262.

The previous prime is 261442477. The next prime is 261442549. The reversal of 261442526 is 625244162.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 261442492 and 261442501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65360630 + ... + 65360633.

It is an arithmetic number, because the mean of its divisors is an integer number (98040948).

Almost surely, 2^261442526 is an apocalyptic number.

261442526 is a deficient number, since it is larger than the sum of its proper divisors (130721266).

261442526 is a wasteful number, since it uses less digits than its factorization.

261442526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130721265.

The product of its digits is 23040, while the sum is 32.

The square root of 261442526 is about 16169.1844568611. The cubic root of 261442526 is about 639.4286290480.

Adding to 261442526 its reverse (625244162), we get a palindrome (886686688).

The spelling of 261442526 in words is "two hundred sixty-one million, four hundred forty-two thousand, five hundred twenty-six".