1401218945 has 12 divisors (see below), whose sum is σ = 1955987604. Its totient is φ = 960835680.

The previous prime is 1401218909. The next prime is 1401218953. The reversal of 1401218945 is 5498121041.

It can be written as a sum of positive squares in 2 ways, for example, as 784392049 + 616826896 = 28007^2 + 24836^2 .

It is not a de Polignac number, because 1401218945 - 2²⁶ = 1334110081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2859386 + ... + 2859875.

It is an arithmetic number, because the mean of its divisors is an integer number (162998967).

Almost surely, 2^1401218945 is an apocalyptic number.

It is an amenable number.

1401218945 is a deficient number, since it is larger than the sum of its proper divisors (554768659).

1401218945 is an equidigital number, since it uses as much as digits as its factorization.

1401218945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719280 (or 5719273 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1401218945 is about 37432.8591614373. The cubic root of 1401218945 is about 1119.0135193974.

Adding to 1401218945 its reverse (5498121041), we get a palindrome (6899339986).

The spelling of 1401218945 in words is "one billion, four hundred one million, two hundred eighteen thousand, nine hundred forty-five".