1641265401 has 8 divisors (see below), whose sum is σ = 2188635520. Its totient is φ = 1094036112.

The previous prime is 1641265397. The next prime is 1641265447. The reversal of 1641265401 is 1045621461.

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

It is not a de Polignac number, because 1641265401 - 2² = 1641265397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641265001) 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, 4081 + ... + 57438.

It is an arithmetic number, because the mean of its divisors is an integer number (273579440).

Almost surely, 2^1641265401 is an apocalyptic number.

It is an amenable number.

1641265401 is a deficient number, since it is larger than the sum of its proper divisors (547370119).

1641265401 is an equidigital number, since it uses as much as digits as its factorization.

1641265401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70415.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1641265401 is about 40512.5338753330. The cubic root of 1641265401 is about 1179.5769337040.

Adding to 1641265401 its reverse (1045621461), we get a palindrome (2686886862).

The spelling of 1641265401 in words is "one billion, six hundred forty-one million, two hundred sixty-five thousand, four hundred one".