1254242139 has 16 divisors (see below), whose sum is σ = 1691000064. Its totient is φ = 826844000.

The previous prime is 1254242063. The next prime is 1254242147. The reversal of 1254242139 is 9312424521.

1254242139 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1254242139 - 2⁹ = 1254241627 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1254242149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295744 + ... + 299954.

It is an arithmetic number, because the mean of its divisors is an integer number (105687504).

Almost surely, 2^1254242139 is an apocalyptic number.

1254242139 is a deficient number, since it is larger than the sum of its proper divisors (436757925).

1254242139 is a wasteful number, since it uses less digits than its factorization.

1254242139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298.

The product of its digits is 17280, while the sum is 33.

The square root of 1254242139 is about 35415.2811509382. The cubic root of 1254242139 is about 1078.4345572865.

The spelling of 1254242139 in words is "one billion, two hundred fifty-four million, two hundred forty-two thousand, one hundred thirty-nine".