1332671621 has 4 divisors (see below), whose sum is σ = 1337380992. Its totient is φ = 1327962252.

The previous prime is 1332671581. The next prime is 1332671623. The reversal of 1332671621 is 1261762331.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1332671621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1332671623) 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, 2354261 + ... + 2354826.

It is an arithmetic number, because the mean of its divisors is an integer number (334345248).

Almost surely, 2^1332671621 is an apocalyptic number.

It is an amenable number.

1332671621 is a deficient number, since it is larger than the sum of its proper divisors (4709371).

1332671621 is an equidigital number, since it uses as much as digits as its factorization.

1332671621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709370.

The product of its digits is 9072, while the sum is 32.

The square root of 1332671621 is about 36505.7751732517. The cubic root of 1332671621 is about 1100.4603090039.

The spelling of 1332671621 in words is "one billion, three hundred thirty-two million, six hundred seventy-one thousand, six hundred twenty-one".