1440242141 has 8 divisors (see below), whose sum is σ = 1553822424. Its totient is φ = 1327060800.

The previous prime is 1440242119. The next prime is 1440242183. The reversal of 1440242141 is 1412420441.

It can be written as a sum of positive squares in 4 ways, for example, as 84456100 + 1355786041 = 9190^2 + 36821^2 .

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

It is not a de Polignac number, because 1440242141 - 2¹⁴ = 1440225757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440242101) 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, 92210 + ... + 106691.

It is an arithmetic number, because the mean of its divisors is an integer number (194227803).

Almost surely, 2^1440242141 is an apocalyptic number.

It is an amenable number.

1440242141 is a deficient number, since it is larger than the sum of its proper divisors (113580283).

1440242141 is a wasteful number, since it uses less digits than its factorization.

1440242141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199471.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1440242141 is about 37950.5222757211. The cubic root of 1440242141 is about 1129.3065265001.

Adding to 1440242141 its reverse (1412420441), we get a palindrome (2852662582).

The spelling of 1440242141 in words is "one billion, four hundred forty million, two hundred forty-two thousand, one hundred forty-one".