261151461 has 12 divisors (see below), whose sum is σ = 382849792. Its totient is φ = 171502056.

The previous prime is 261151459. The next prime is 261151463. The reversal of 261151461 is 164151162.

261151461 is a `hidden beast` number, since 2 + 611 + 5 + 1 + 46 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (261151459) and next prime (261151463).

It is not a de Polignac number, because 261151461 - 2¹ = 261151459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261151463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215941 + ... + 217146.

Almost surely, 2^261151461 is an apocalyptic number.

It is an amenable number.

261151461 is a deficient number, since it is larger than the sum of its proper divisors (121698331).

261151461 is a wasteful number, since it uses less digits than its factorization.

261151461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433160 (or 433157 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 261151461 is about 16160.1813418043. The cubic root of 261151461 is about 639.1912481251.

The spelling of 261151461 in words is "two hundred sixty-one million, one hundred fifty-one thousand, four hundred sixty-one".