1244545401 has 32 divisors (see below), whose sum is σ = 1930843008. Its totient is φ = 704675840.

The previous prime is 1244545397. The next prime is 1244545427. The reversal of 1244545401 is 1045454421.

It is not a de Polignac number, because 1244545401 - 2² = 1244545397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244545481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68761 + ... + 84953.

It is an arithmetic number, because the mean of its divisors is an integer number (60338844).

Almost surely, 2^1244545401 is an apocalyptic number.

1244545401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1244545401 is a deficient number, since it is larger than the sum of its proper divisors (686297607).

1244545401 is a wasteful number, since it uses less digits than its factorization.

1244545401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16361.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 1244545401 is about 35278.1150431822. The cubic root of 1244545401 is about 1075.6481833844.

Adding to 1244545401 its reverse (1045454421), we get a palindrome (2289999822).

It can be divided in two parts, 1244 and 545401, that added together give a palindrome (546645).

The spelling of 1244545401 in words is "one billion, two hundred forty-four million, five hundred forty-five thousand, four hundred one".