91421201 has 8 divisors (see below), whose sum is σ = 94502400. Its totient is φ = 88348320.

The previous prime is 91421153. The next prime is 91421219. The reversal of 91421201 is 10212419.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91421201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91421221) 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, 26885 + ... + 30093.

It is an arithmetic number, because the mean of its divisors is an integer number (11812800).

Almost surely, 2^91421201 is an apocalyptic number.

It is an amenable number.

91421201 is a deficient number, since it is larger than the sum of its proper divisors (3081199).

91421201 is a wasteful number, since it uses less digits than its factorization.

91421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 91421201 is about 9561.4434579722. The cubic root of 91421201 is about 450.4870463299.

The spelling of 91421201 in words is "ninety-one million, four hundred twenty-one thousand, two hundred one".