261876422 has 4 divisors (see below), whose sum is σ = 392814636. Its totient is φ = 130938210.

The previous prime is 261876421. The next prime is 261876443. The reversal of 261876422 is 224678162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224678162 = 2 ⋅112339081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261876421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65469104 + ... + 65469107.

It is an arithmetic number, because the mean of its divisors is an integer number (98203659).

Almost surely, 2^261876422 is an apocalyptic number.

261876422 is a deficient number, since it is larger than the sum of its proper divisors (130938214).

261876422 is a wasteful number, since it uses less digits than its factorization.

261876422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130938213.

The product of its digits is 64512, while the sum is 38.

The square root of 261876422 is about 16182.5962688315. The cubic root of 261876422 is about 639.7821703343.

The spelling of 261876422 in words is "two hundred sixty-one million, eight hundred seventy-six thousand, four hundred twenty-two".