1864125101 has 4 divisors (see below), whose sum is σ = 1864235100. Its totient is φ = 1864015104.

The previous prime is 1864125097. The next prime is 1864125103. The reversal of 1864125101 is 1015214681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1015214681 = 13 ⋅78093437.

It can be written as a sum of positive squares in 2 ways, for example, as 638775076 + 1225350025 = 25274^2 + 35005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864125101 - 2² = 1864125097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864125103) 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 3 ways as a sum of consecutive naturals, for example, 23606 + ... + 65463.

It is an arithmetic number, because the mean of its divisors is an integer number (466058775).

Almost surely, 2^1864125101 is an apocalyptic number.

It is an amenable number.

1864125101 is a deficient number, since it is larger than the sum of its proper divisors (109999).

1864125101 is an equidigital number, since it uses as much as digits as its factorization.

1864125101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109998.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1864125101 is about 43175.5150635172. The cubic root of 1864125101 is about 1230.7174304017.

Adding to 1864125101 its reverse (1015214681), we get a palindrome (2879339782).

The spelling of 1864125101 in words is "one billion, eight hundred sixty-four million, one hundred twenty-five thousand, one hundred one".