1504994129 has 4 divisors (see below), whose sum is σ = 1545669684. Its totient is φ = 1464318576.

The previous prime is 1504994087. The next prime is 1504994221. The reversal of 1504994129 is 9214994051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9214994051 = 89 ⋅103539259.

It can be written as a sum of positive squares in 2 ways, for example, as 596092225 + 908901904 = 24415^2 + 30148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1504994129 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 1504994129.

It is not an unprimeable number, because it can be changed into a prime (1504994929) 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, 20337722 + ... + 20337795.

It is an arithmetic number, because the mean of its divisors is an integer number (386417421).

Almost surely, 2^1504994129 is an apocalyptic number.

It is an amenable number.

1504994129 is a deficient number, since it is larger than the sum of its proper divisors (40675555).

1504994129 is an equidigital number, since it uses as much as digits as its factorization.

1504994129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40675554.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1504994129 is about 38794.2538141926. The cubic root of 1504994129 is about 1145.9832464883.

The spelling of 1504994129 in words is "one billion, five hundred four million, nine hundred ninety-four thousand, one hundred twenty-nine".