1401606445 has 4 divisors (see below), whose sum is σ = 1681927740. Its totient is φ = 1121285152.

The previous prime is 1401606439. The next prime is 1401606449. The reversal of 1401606445 is 5446061041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5446061041 = 2999 ⋅1815959.

It can be written as a sum of positive squares in 2 ways, for example, as 502746084 + 898860361 = 22422^2 + 29981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401606445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401606449) 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, 140160640 + ... + 140160649.

It is an arithmetic number, because the mean of its divisors is an integer number (420481935).

Almost surely, 2^1401606445 is an apocalyptic number.

It is an amenable number.

1401606445 is a deficient number, since it is larger than the sum of its proper divisors (280321295).

1401606445 is an equidigital number, since it uses as much as digits as its factorization.

1401606445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280321294.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1401606445 is about 37438.0347374164. The cubic root of 1401606445 is about 1119.1166623965.

Adding to 1401606445 its reverse (5446061041), we get a palindrome (6847667486).

The spelling of 1401606445 in words is "one billion, four hundred one million, six hundred six thousand, four hundred forty-five".