32661421 has 4 divisors (see below), whose sum is σ = 35173852. Its totient is φ = 30148992.

The previous prime is 32661401. The next prime is 32661427. The reversal of 32661421 is 12416623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 27772900 = 2211^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 32661421 - 2²¹ = 30564269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32661427) 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, 1256196 + ... + 1256221.

It is an arithmetic number, because the mean of its divisors is an integer number (8793463).

Almost surely, 2^32661421 is an apocalyptic number.

It is an amenable number.

32661421 is a deficient number, since it is larger than the sum of its proper divisors (2512431).

32661421 is a wasteful number, since it uses less digits than its factorization.

32661421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512430.

The product of its digits is 1728, while the sum is 25.

The square root of 32661421 is about 5715.0171478308. The cubic root of 32661421 is about 319.6526863287.

The spelling of 32661421 in words is "thirty-two million, six hundred sixty-one thousand, four hundred twenty-one".