32121040 has 80 divisors (see below), whose sum is σ = 87494400. Its totient is φ = 10736640.

The previous prime is 32121029. The next prime is 32121071. The reversal of 32121040 is 4012123.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×32121040² = 2063522421363200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 32121040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22261 + ... + 23659.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^32121040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32121040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43747200).

32121040 is an abundant number, since it is smaller than the sum of its proper divisors (55373360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

32121040 is a wasteful number, since it uses less digits than its factorization.

32121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1454 counting only the distinct ones).

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

The square root of 32121040 is about 5667.5426773867. The cubic root of 32121040 is about 317.8799963850.

Adding to 32121040 its reverse (4012123), we get a palindrome (36133163).

The spelling of 32121040 in words is "thirty-two million, one hundred twenty-one thousand, forty".