1440000121 has 8 divisors (see below), whose sum is σ = 1646793344. Its totient is φ = 1233476640.

The previous prime is 1440000119. The next prime is 1440000131. The reversal of 1440000121 is 1210000441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1440000121 - 2¹ = 1440000119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440000131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55860 + ... + 77461.

It is an arithmetic number, because the mean of its divisors is an integer number (205849168).

Almost surely, 2^1440000121 is an apocalyptic number.

It is an amenable number.

1440000121 is a deficient number, since it is larger than the sum of its proper divisors (206793223).

1440000121 is a wasteful number, since it uses less digits than its factorization.

1440000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134871.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1440000121 is about 37947.3335163355. Note that the first 3 decimals coincide. The cubic root of 1440000121 is about 1129.2432662865.

Adding to 1440000121 its reverse (1210000441), we get a palindrome (2650000562).

It can be divided in two parts, 1440000 and 121, that multiplied together give a square (174240000 = 13200²).

The spelling of 1440000121 in words is "one billion, four hundred forty million, one hundred twenty-one", and thus it is an aban number.