1442056257 has 8 divisors (see below), whose sum is σ = 2136379680. Its totient is φ = 961370820.

The previous prime is 1442056249. The next prime is 1442056261. The reversal of 1442056257 is 7526502441.

It is a happy number.

1442056257 is a `hidden beast` number, since 1 + 4 + 4 + 20 + 5 + 625 + 7 = 666.

It is not a de Polignac number, because 1442056257 - 2³ = 1442056249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1442056207) 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, 26704719 + ... + 26704772.

It is an arithmetic number, because the mean of its divisors is an integer number (267047460).

Almost surely, 2^1442056257 is an apocalyptic number.

It is an amenable number.

1442056257 is a deficient number, since it is larger than the sum of its proper divisors (694323423).

1442056257 is an equidigital number, since it uses as much as digits as its factorization.

1442056257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53409500 (or 53409494 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 1442056257 is about 37974.4158217082. The cubic root of 1442056257 is about 1129.7804823278.

Adding to 1442056257 its reverse (7526502441), we get a palindrome (8968558698).

The spelling of 1442056257 in words is "one billion, four hundred forty-two million, fifty-six thousand, two hundred fifty-seven".