32401021 has 4 divisors (see below), whose sum is σ = 32415292. Its totient is φ = 32386752.

The previous prime is 32401009. The next prime is 32401037. The reversal of 32401021 is 12010423.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12010423 = 31 ⋅387433.

It can be written as a sum of positive squares in 2 ways, for example, as 11148921 + 21252100 = 3339^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 32401021 - 2¹⁷ = 32269949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32400992 and 32401010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32401051) 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 3 ways as a sum of consecutive naturals, for example, 2886 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (8103823).

Almost surely, 2^32401021 is an apocalyptic number.

It is an amenable number.

32401021 is a deficient number, since it is larger than the sum of its proper divisors (14271).

32401021 is a wasteful number, since it uses less digits than its factorization.

32401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14270.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 32401021 is about 5692.1894733046. The cubic root of 32401021 is about 318.8009194060.

Adding to 32401021 its reverse (12010423), we get a palindrome (44411444).

The spelling of 32401021 in words is "thirty-two million, four hundred one thousand, twenty-one".