32520413 has 4 divisors (see below), whose sum is σ = 33934368. Its totient is φ = 31106460.

The previous prime is 32520409. The next prime is 32520431. The reversal of 32520413 is 31402523.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31402523 = 1019 ⋅30817.

It is a cyclic number.

It is not a de Polignac number, because 32520413 - 2² = 32520409 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 (32520463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706943 + ... + 706988.

It is an arithmetic number, because the mean of its divisors is an integer number (8483592).

Almost surely, 2^32520413 is an apocalyptic number.

It is an amenable number.

32520413 is a deficient number, since it is larger than the sum of its proper divisors (1413955).

32520413 is a wasteful number, since it uses less digits than its factorization.

32520413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413954.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 32520413 is about 5702.6671829943. The cubic root of 32520413 is about 319.1920143238.

Adding to 32520413 its reverse (31402523), we get a palindrome (63922936).

The spelling of 32520413 in words is "thirty-two million, five hundred twenty thousand, four hundred thirteen".