1255421039 has 2 divisors, whose sum is σ = 1255421040. Its totient is φ = 1255421038.

The previous prime is 1255421033. The next prime is 1255421051. The reversal of 1255421039 is 9301245521.

It is a weak prime.

It is an emirp because it is prime and its reverse (9301245521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255421039 - 2²⁸ = 986985583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1255420996 and 1255421014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255421033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627710519 + 627710520.

It is an arithmetic number, because the mean of its divisors is an integer number (627710520).

Almost surely, 2^1255421039 is an apocalyptic number.

1255421039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255421039 is an equidigital number, since it uses as much as digits as its factorization.

1255421039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1255421039 is about 35431.9211869749. The cubic root of 1255421039 is about 1078.7723358637.

The spelling of 1255421039 in words is "one billion, two hundred fifty-five million, four hundred twenty-one thousand, thirty-nine".