1252421519 has 2 divisors, whose sum is σ = 1252421520. Its totient is φ = 1252421518.

The previous prime is 1252421491. The next prime is 1252421539. The reversal of 1252421519 is 9151242521.

It is a strong prime.

It is an emirp because it is prime and its reverse (9151242521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252421519 is a prime.

It is a super-2 number, since 2×1252421519² = 3137119322508534722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252421539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626210759 + 626210760.

It is an arithmetic number, because the mean of its divisors is an integer number (626210760).

Almost surely, 2^1252421519 is an apocalyptic number.

1252421519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252421519 is an equidigital number, since it uses as much as digits as its factorization.

1252421519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 1252421519 is about 35389.5679402843. The cubic root of 1252421519 is about 1077.9124969275.

It can be divided in two parts, 12524 and 21519, that added together give a palindrome (34043).

The spelling of 1252421519 in words is "one billion, two hundred fifty-two million, four hundred twenty-one thousand, five hundred nineteen".