1440621601 has 4 divisors (see below), whose sum is σ = 1442452912. Its totient is φ = 1438790292.

The previous prime is 1440621569. The next prime is 1440621613. The reversal of 1440621601 is 1061260441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1440621601 - 2⁵ = 1440621569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440621631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914475 + ... + 916048.

It is an arithmetic number, because the mean of its divisors is an integer number (360613228).

Almost surely, 2^1440621601 is an apocalyptic number.

It is an amenable number.

1440621601 is a deficient number, since it is larger than the sum of its proper divisors (1831311).

1440621601 is an equidigital number, since it uses as much as digits as its factorization.

1440621601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831310.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1440621601 is about 37955.5213506546. The cubic root of 1440621601 is about 1129.4056970986.

The spelling of 1440621601 in words is "one billion, four hundred forty million, six hundred twenty-one thousand, six hundred one".