32561240 has 16 divisors (see below), whose sum is σ = 73262880. Its totient is φ = 13024480.

The previous prime is 32561237. The next prime is 32561267. The reversal of 32561240 is 4216523.

It is a zygodrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406976 + ... + 407055.

It is an arithmetic number, because the mean of its divisors is an integer number (4578930).

Almost surely, 2^32561240 is an apocalyptic number.

It is an amenable number.

32561240 is an abundant number, since it is smaller than the sum of its proper divisors (40701640).

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

32561240 is a wasteful number, since it uses less digits than its factorization.

32561240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814042 (or 814038 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 32561240 is about 5706.2457009841. The cubic root of 32561240 is about 319.3255325414.

Adding to 32561240 its reverse (4216523), we get a palindrome (36777763).

The spelling of 32561240 in words is "thirty-two million, five hundred sixty-one thousand, two hundred forty".