1440142100 has 18 divisors (see below), whose sum is σ = 3125108574. Its totient is φ = 576056800.

The previous prime is 1440142091. The next prime is 1440142139. The reversal of 1440142100 is 12410441.

It can be written as a sum of positive squares in 3 ways, for example, as 105555076 + 1334587024 = 10274^2 + 36532^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7200611 + ... + 7200810.

It is an arithmetic number, because the mean of its divisors is an integer number (173617143).

Almost surely, 2^1440142100 is an apocalyptic number.

1440142100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440142100 is an abundant number, since it is smaller than the sum of its proper divisors (1684966474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440142100 is a wasteful number, since it uses less digits than its factorization.

1440142100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14401435 (or 14401428 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1440142100 is about 37949.2042077301. The cubic root of 1440142100 is about 1129.2803782187.

Adding to 1440142100 its reverse (12410441), we get a palindrome (1452552541).

The spelling of 1440142100 in words is "one billion, four hundred forty million, one hundred forty-two thousand, one hundred".