1245501139 has 8 divisors (see below), whose sum is σ = 1253266832. Its totient is φ = 1237753440.

The previous prime is 1245501137. The next prime is 1245501143. The reversal of 1245501139 is 9311055421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245501139 - 2¹ = 1245501137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1245501139.

It is not an unprimeable number, because it can be changed into a prime (1245501137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150637 + ... + 158689.

It is an arithmetic number, because the mean of its divisors is an integer number (156658354).

Almost surely, 2^1245501139 is an apocalyptic number.

1245501139 is a deficient number, since it is larger than the sum of its proper divisors (7765693).

1245501139 is an equidigital number, since it uses as much as digits as its factorization.

1245501139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8997.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1245501139 is about 35291.6582070041. The cubic root of 1245501139 is about 1075.9234578734.

The spelling of 1245501139 in words is "one billion, two hundred forty-five million, five hundred one thousand, one hundred thirty-nine".