1254562139 has 2 divisors, whose sum is σ = 1254562140. Its totient is φ = 1254562138.

The previous prime is 1254562121. The next prime is 1254562151. The reversal of 1254562139 is 9312654521.

It is a strong prime.

It is an emirp because it is prime and its reverse (9312654521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254562139 - 2¹² = 1254558043 is a prime.

It is a super-2 number, since 2×1254562139² = 3147852321224510642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1254592139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627281069 + 627281070.

It is an arithmetic number, because the mean of its divisors is an integer number (627281070).

Almost surely, 2^1254562139 is an apocalyptic number.

1254562139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254562139 is an equidigital number, since it uses as much as digits as its factorization.

1254562139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 1254562139 is about 35419.7986866103. The cubic root of 1254562139 is about 1078.5262646485.

The spelling of 1254562139 in words is "one billion, two hundred fifty-four million, five hundred sixty-two thousand, one hundred thirty-nine".