40821201 has 6 divisors (see below), whose sum is σ = 58963970. Its totient is φ = 27214128.

The previous prime is 40821197. The next prime is 40821217. The reversal of 40821201 is 10212804.

It can be written as a sum of positive squares in only one way, i.e., 26532801 + 14288400 = 5151^2 + 3780^2 .

It is not a de Polignac number, because 40821201 - 2² = 40821197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40821401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2267836 + ... + 2267853.

Almost surely, 2^40821201 is an apocalyptic number.

It is an amenable number.

40821201 is a deficient number, since it is larger than the sum of its proper divisors (18142769).

40821201 is a wasteful number, since it uses less digits than its factorization.

40821201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535695 (or 4535692 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 40821201 is about 6389.1471261820. The cubic root of 40821201 is about 344.3197433859.

It can be divided in two parts, 408 and 21201, that added together give a square (21609 = 147²).

The spelling of 40821201 in words is "forty million, eight hundred twenty-one thousand, two hundred one".