261341045 has 8 divisors (see below), whose sum is σ = 358410624. Its totient is φ = 179205264.

The previous prime is 261341023. The next prime is 261341053. The reversal of 261341045 is 540143162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261341045 - 2¹⁰ = 261340021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3733409 + ... + 3733478.

It is an arithmetic number, because the mean of its divisors is an integer number (44801328).

Almost surely, 2^261341045 is an apocalyptic number.

It is an amenable number.

261341045 is a deficient number, since it is larger than the sum of its proper divisors (97069579).

261341045 is an equidigital number, since it uses as much as digits as its factorization.

261341045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466899.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 261341045 is about 16166.0460533799. The cubic root of 261341045 is about 639.3458852351.

The spelling of 261341045 in words is "two hundred sixty-one million, three hundred forty-one thousand, forty-five".