1042505257 has 2 divisors, whose sum is σ = 1042505258. Its totient is φ = 1042505256.

The previous prime is 1042505249. The next prime is 1042505309. The reversal of 1042505257 is 7525052401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603979776 + 438525481 = 24576^2 + 20941^2 .

It is an emirp because it is prime and its reverse (7525052401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042505257 - 2³ = 1042505249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042505207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521252628 + 521252629.

It is an arithmetic number, because the mean of its divisors is an integer number (521252629).

Almost surely, 2^1042505257 is an apocalyptic number.

It is an amenable number.

1042505257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042505257 is an equidigital number, since it uses as much as digits as its factorization.

1042505257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 1042505257 is about 32287.8499903602. The cubic root of 1042505257 is about 1013.9722850064.

Adding to 1042505257 its reverse (7525052401), we get a palindrome (8567557658).

The spelling of 1042505257 in words is "one billion, forty-two million, five hundred five thousand, two hundred fifty-seven".