1975942145 has 8 divisors (see below), whose sum is σ = 2495927040. Its totient is φ = 1497556080.

The previous prime is 1975942127. The next prime is 1975942211. The reversal of 1975942145 is 5412495791.

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

It is not a de Polignac number, because 1975942145 - 2¹⁴ = 1975925761 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1975942145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10399601 + ... + 10399790.

It is an arithmetic number, because the mean of its divisors is an integer number (311990880).

Almost surely, 2^1975942145 is an apocalyptic number.

It is an amenable number.

1975942145 is a deficient number, since it is larger than the sum of its proper divisors (519984895).

1975942145 is a wasteful number, since it uses less digits than its factorization.

1975942145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20799415.

The product of its digits is 453600, while the sum is 47.

The square root of 1975942145 is about 44451.5707821445. The cubic root of 1975942145 is about 1254.8488244013.

The spelling of 1975942145 in words is "one billion, nine hundred seventy-five million, nine hundred forty-two thousand, one hundred forty-five".