1442651645 has 16 divisors (see below), whose sum is σ = 1779927600. Its totient is φ = 1121693184.

The previous prime is 1442651633. The next prime is 1442651663. The reversal of 1442651645 is 5461562441.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 514291684 + 928359961 = 22678^2 + 30469^2 .

It is not a de Polignac number, because 1442651645 - 2¹⁴ = 1442635261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1442651599 and 1442651608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187331 + ... + 194879.

It is an arithmetic number, because the mean of its divisors is an integer number (111245475).

Almost surely, 2^1442651645 is an apocalyptic number.

It is an amenable number.

1442651645 is a deficient number, since it is larger than the sum of its proper divisors (337275955).

1442651645 is a wasteful number, since it uses less digits than its factorization.

1442651645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8624.

The product of its digits is 115200, while the sum is 38.

The square root of 1442651645 is about 37982.2543433114. The cubic root of 1442651645 is about 1129.9359467178.

The spelling of 1442651645 in words is "one billion, four hundred forty-two million, six hundred fifty-one thousand, six hundred forty-five".