1975420129 has 8 divisors (see below), whose sum is σ = 2021964032. Its totient is φ = 1928903760.

The previous prime is 1975420127. The next prime is 1975420141. The reversal of 1975420129 is 9210245791.

It is a happy number.

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 1975420129 - 2¹ = 1975420127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1975420091 and 1975420100.

It is not an unprimeable number, because it can be changed into a prime (1975420127) 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, 245047 + ... + 252979.

It is an arithmetic number, because the mean of its divisors is an integer number (252745504).

Almost surely, 2^1975420129 is an apocalyptic number.

It is an amenable number.

1975420129 is a deficient number, since it is larger than the sum of its proper divisors (46543903).

1975420129 is an equidigital number, since it uses as much as digits as its factorization.

1975420129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13767.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1975420129 is about 44445.6986557755. The cubic root of 1975420129 is about 1254.7383102247.

The spelling of 1975420129 in words is "one billion, nine hundred seventy-five million, four hundred twenty thousand, one hundred twenty-nine".