1001440455 has 16 divisors (see below), whose sum is σ = 1603544064. Its totient is φ = 533688480.

The previous prime is 1001440439. The next prime is 1001440481. The reversal of 1001440455 is 5540441001.

It is a happy number.

It is not a de Polignac number, because 1001440455 - 2⁴ = 1001440439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5251 + ... + 45060.

It is an arithmetic number, because the mean of its divisors is an integer number (100221504).

Almost surely, 2^1001440455 is an apocalyptic number.

1001440455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001440455 is a deficient number, since it is larger than the sum of its proper divisors (602103609).

1001440455 is a wasteful number, since it uses less digits than its factorization.

1001440455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51646.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1001440455 is about 31645.5439991162. The cubic root of 1001440455 is about 1000.4799213054.

Adding to 1001440455 its reverse (5540441001), we get a palindrome (6541881456).

The spelling of 1001440455 in words is "one billion, one million, four hundred forty thousand, four hundred fifty-five".