132521021 has 8 divisors (see below), whose sum is σ = 134957760. Its totient is φ = 130090752.

The previous prime is 132520951. The next prime is 132521023. The reversal of 132521021 is 120125231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 132521021 - 2²² = 128326717 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 (132521023) 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, 61661 + ... + 63773.

It is an arithmetic number, because the mean of its divisors is an integer number (16869720).

Almost surely, 2^132521021 is an apocalyptic number.

It is an amenable number.

132521021 is a deficient number, since it is larger than the sum of its proper divisors (2436739).

132521021 is a wasteful number, since it uses less digits than its factorization.

132521021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 132521021 is about 11511.7774909004. Note that the first 3 decimals coincide. The cubic root of 132521021 is about 509.8333698876.

Adding to 132521021 its reverse (120125231), we get a palindrome (252646252).

It can be divided in two parts, 1325210 and 21, that added together give a palindrome (1325231).

The spelling of 132521021 in words is "one hundred thirty-two million, five hundred twenty-one thousand, twenty-one".