87241761 has 18 divisors (see below), whose sum is σ = 127227282. Its totient is φ = 57607200.

The previous prime is 87241723. The next prime is 87241769. The reversal of 87241761 is 16714278.

It can be written as a sum of positive squares in only one way, i.e., 83612736 + 3629025 = 9144^2 + 1905^2 .

It is not a de Polignac number, because 87241761 - 2⁶ = 87241697 is a prime.

It is a super-2 number, since 2×87241761² = 15222249724762242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87241769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 144861 + ... + 145461.

Almost surely, 2^87241761 is an apocalyptic number.

It is an amenable number.

87241761 is a deficient number, since it is larger than the sum of its proper divisors (39985521).

87241761 is a wasteful number, since it uses less digits than its factorization.

87241761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 731 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 87241761 is about 9340.3298121640. The cubic root of 87241761 is about 443.5148249064.

The spelling of 87241761 in words is "eighty-seven million, two hundred forty-one thousand, seven hundred sixty-one".