1444021425 has 240 divisors, whose sum is σ = 3417668160. Its totient is φ = 600112800.

The previous prime is 1444021421. The next prime is 1444021433. The reversal of 1444021425 is 5241204441.

1444021425 is a `hidden beast` number, since 1 + 4 + 440 + 214 + 2 + 5 = 666.

It is not a de Polignac number, because 1444021425 - 2² = 1444021421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1444021421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 131274670 + ... + 131274680.

It is an arithmetic number, because the mean of its divisors is an integer number (14240284).

Almost surely, 2^1444021425 is an apocalyptic number.

1444021425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1444021425 is an abundant number, since it is smaller than the sum of its proper divisors (1973646735).

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

1444021425 is an frugal number, since it uses more digits than its factorization.

1444021425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 1444021425 is about 38000.2819068491. The cubic root of 1444021425 is about 1130.2934536885.

Adding to 1444021425 its reverse (5241204441), we get a palindrome (6685225866).

The spelling of 1444021425 in words is "one billion, four hundred forty-four million, twenty-one thousand, four hundred twenty-five".