1442553257 has 2 divisors, whose sum is σ = 1442553258. Its totient is φ = 1442553256.

The previous prime is 1442553247. The next prime is 1442553269. The reversal of 1442553257 is 7523552441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1352474176 + 90079081 = 36776^2 + 9491^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442553257 - 2¹⁶ = 1442487721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1442553257.

It is not a weakly prime, because it can be changed into another prime (1442553247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721276628 + 721276629.

It is an arithmetic number, because the mean of its divisors is an integer number (721276629).

Almost surely, 2^1442553257 is an apocalyptic number.

It is an amenable number.

1442553257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442553257 is an equidigital number, since it uses as much as digits as its factorization.

1442553257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168000, while the sum is 38.

The square root of 1442553257 is about 37980.9591374415. The cubic root of 1442553257 is about 1129.9102591431.

The spelling of 1442553257 in words is "one billion, four hundred forty-two million, five hundred fifty-three thousand, two hundred fifty-seven".