132720251 has 4 divisors (see below), whose sum is σ = 132963432. Its totient is φ = 132477072.

The previous prime is 132720209. The next prime is 132720277. The reversal of 132720251 is 152027231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152027231 = 43 ⋅3535517.

It is a cyclic number.

It is not a de Polignac number, because 132720251 - 2¹⁸ = 132458107 is a prime.

It is a super-2 number, since 2×132720251² = 35229330051006002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132722251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120770 + ... + 121863.

It is an arithmetic number, because the mean of its divisors is an integer number (33240858).

Almost surely, 2^132720251 is an apocalyptic number.

132720251 is a deficient number, since it is larger than the sum of its proper divisors (243181).

132720251 is an equidigital number, since it uses as much as digits as its factorization.

132720251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243180.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 132720251 is about 11520.4275528298. The cubic root of 132720251 is about 510.0887337595.

Adding to 132720251 its reverse (152027231), we get a palindrome (284747482).

The spelling of 132720251 in words is "one hundred thirty-two million, seven hundred twenty thousand, two hundred fifty-one".