32148721 has 8 divisors (see below), whose sum is σ = 35157888. Its totient is φ = 29154000.

The previous prime is 32148719. The next prime is 32148737. The reversal of 32148721 is 12784123.

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 32148721 - 2¹ = 32148719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32148721.

It is not an unprimeable number, because it can be changed into a prime (32148761) 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, 1351 + ... + 8131.

It is an arithmetic number, because the mean of its divisors is an integer number (4394736).

Almost surely, 2^32148721 is an apocalyptic number.

It is an amenable number.

32148721 is a deficient number, since it is larger than the sum of its proper divisors (3009167).

32148721 is a wasteful number, since it uses less digits than its factorization.

32148721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223.

The product of its digits is 2688, while the sum is 28.

The square root of 32148721 is about 5669.9842151456. The cubic root of 32148721 is about 317.9712834847.

It can be divided in two parts, 3214 and 8721, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 32148721 in words is "thirty-two million, one hundred forty-eight thousand, seven hundred twenty-one".