99021261 has 8 divisors (see below), whose sum is σ = 132075360. Its totient is φ = 65990672.

The previous prime is 99021253. The next prime is 99021281. The reversal of 99021261 is 16212099.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99021261 - 2³ = 99021253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10375 + ... + 17483.

It is an arithmetic number, because the mean of its divisors is an integer number (16509420).

Almost surely, 2^99021261 is an apocalyptic number.

It is an amenable number.

99021261 is a deficient number, since it is larger than the sum of its proper divisors (33054099).

99021261 is a wasteful number, since it uses less digits than its factorization.

99021261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11755.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 99021261 is about 9950.9427191598. The cubic root of 99021261 is about 462.6396146315.

The spelling of 99021261 in words is "ninety-nine million, twenty-one thousand, two hundred sixty-one".