1442745081 has 16 divisors (see below), whose sum is σ = 2230331520. Its totient is φ = 920010960.

The previous prime is 1442745067. The next prime is 1442745089. The reversal of 1442745081 is 1805472441.

It is a happy number.

1442745081 is a `hidden beast` number, since 144 + 2 + 7 + 4 + 508 + 1 = 666.

It is not a de Polignac number, because 1442745081 - 2²⁶ = 1375636217 is a prime.

It is a super-2 number, since 2×1442745081² = 4163026737499393122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1442745089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1161010 + ... + 1162251.

It is an arithmetic number, because the mean of its divisors is an integer number (139395720).

Almost surely, 2^1442745081 is an apocalyptic number.

It is an amenable number.

1442745081 is a deficient number, since it is larger than the sum of its proper divisors (787586439).

1442745081 is a wasteful number, since it uses less digits than its factorization.

1442745081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323293 (or 2323287 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 1442745081 is about 37983.4843188457. The cubic root of 1442745081 is about 1129.9603403211.

The spelling of 1442745081 in words is "one billion, four hundred forty-two million, seven hundred forty-five thousand, eighty-one".