87951261 has 8 divisors (see below), whose sum is σ = 117313504. Its totient is φ = 58611600.

The previous prime is 87951233. The next prime is 87951289. The reversal of 87951261 is 16215978.

It is an interprime number because it is at equal distance from previous prime (87951233) and next prime (87951289).

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

It is not a de Polignac number, because 87951261 - 2⁹ = 87950749 is a prime.

It is a super-2 number, since 2×87951261² = 15470848622980242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87951961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8535 + ... + 15771.

It is an arithmetic number, because the mean of its divisors is an integer number (14664188).

Almost surely, 2^87951261 is an apocalyptic number.

It is an amenable number.

87951261 is a deficient number, since it is larger than the sum of its proper divisors (29362243).

87951261 is a wasteful number, since it uses less digits than its factorization.

87951261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11291.

The product of its digits is 30240, while the sum is 39.

The square root of 87951261 is about 9378.2333624196. The cubic root of 87951261 is about 444.7138858538.

The spelling of 87951261 in words is "eighty-seven million, nine hundred fifty-one thousand, two hundred sixty-one".