261141451 has 4 divisors (see below), whose sum is σ = 267214552. Its totient is φ = 255068352.

The previous prime is 261141431. The next prime is 261141487. The reversal of 261141451 is 154141162.

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

It is a cyclic number.

It is not a de Polignac number, because 261141451 - 2¹³ = 261133259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261141401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3036486 + ... + 3036571.

It is an arithmetic number, because the mean of its divisors is an integer number (66803638).

Almost surely, 2^261141451 is an apocalyptic number.

261141451 is a deficient number, since it is larger than the sum of its proper divisors (6073101).

261141451 is an equidigital number, since it uses as much as digits as its factorization.

261141451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073100.

The product of its digits is 960, while the sum is 25.

The square root of 261141451 is about 16159.8716269654. The cubic root of 261141451 is about 639.1830812347.

The spelling of 261141451 in words is "two hundred sixty-one million, one hundred forty-one thousand, four hundred fifty-one".