1254479839 has 2 divisors, whose sum is σ = 1254479840. Its totient is φ = 1254479838.

The previous prime is 1254479803. The next prime is 1254479887. The reversal of 1254479839 is 9389744521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1254479839 - 2⁹ = 1254479327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254471839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627239919 + 627239920.

It is an arithmetic number, because the mean of its divisors is an integer number (627239920).

Almost surely, 2^1254479839 is an apocalyptic number.

1254479839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254479839 is an equidigital number, since it uses as much as digits as its factorization.

1254479839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The square root of 1254479839 is about 35418.6368879436. The cubic root of 1254479839 is about 1078.5026801511.

The spelling of 1254479839 in words is "one billion, two hundred fifty-four million, four hundred seventy-nine thousand, eight hundred thirty-nine".