1201003139 has 4 divisors (see below), whose sum is σ = 1372575024. Its totient is φ = 1029431256.

The previous prime is 1201003087. The next prime is 1201003151. The reversal of 1201003139 is 9313001021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9313001021 = 431 ⋅21607891.

It is not a de Polignac number, because 1201003139 - 2⁸ = 1201002883 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 1201003139.

It is not an unprimeable number, because it can be changed into a prime (1201003159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85785932 + ... + 85785945.

It is an arithmetic number, because the mean of its divisors is an integer number (343143756).

Almost surely, 2^1201003139 is an apocalyptic number.

1201003139 is a deficient number, since it is larger than the sum of its proper divisors (171571885).

1201003139 is an equidigital number, since it uses as much as digits as its factorization.

1201003139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171571884.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1201003139 is about 34655.4921909933. The cubic root of 1201003139 is about 1062.9545962252.

The spelling of 1201003139 in words is "one billion, two hundred one million, three thousand, one hundred thirty-nine".