261410774 has 4 divisors (see below), whose sum is σ = 392116164. Its totient is φ = 130705386.

The previous prime is 261410771. The next prime is 261410777. The reversal of 261410774 is 477014162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 477014162 = 2 ⋅238507081.

It is an interprime number because it is at equal distance from previous prime (261410771) and next prime (261410777).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 261410774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261410771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65352692 + ... + 65352695.

It is an arithmetic number, because the mean of its divisors is an integer number (98029041).

Almost surely, 2^261410774 is an apocalyptic number.

261410774 is a deficient number, since it is larger than the sum of its proper divisors (130705390).

261410774 is a wasteful number, since it uses less digits than its factorization.

261410774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130705389.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 261410774 is about 16168.2025593447. The cubic root of 261410774 is about 639.4027419564.

The spelling of 261410774 in words is "two hundred sixty-one million, four hundred ten thousand, seven hundred seventy-four".