1671228401 has 4 divisors (see below), whose sum is σ = 1769535972. Its totient is φ = 1572920832.

The previous prime is 1671228371. The next prime is 1671228437. The reversal of 1671228401 is 1048221761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1530687376 + 140541025 = 39124^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671228401 - 2¹⁰ = 1671227377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671228901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49153760 + ... + 49153793.

It is an arithmetic number, because the mean of its divisors is an integer number (442383993).

Almost surely, 2^1671228401 is an apocalyptic number.

It is an amenable number.

1671228401 is a deficient number, since it is larger than the sum of its proper divisors (98307571).

1671228401 is an equidigital number, since it uses as much as digits as its factorization.

1671228401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98307570.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1671228401 is about 40880.6604765628. The cubic root of 1671228401 is about 1186.7118229232.

The spelling of 1671228401 in words is "one billion, six hundred seventy-one million, two hundred twenty-eight thousand, four hundred one".