1801941129 has 24 divisors (see below), whose sum is σ = 2850948360. Its totient is φ = 1091639808.

The previous prime is 1801941121. The next prime is 1801941137. The reversal of 1801941129 is 9211491081.

It is an interprime number because it is at equal distance from previous prime (1801941121) and next prime (1801941137).

It can be written as a sum of positive squares in 4 ways, for example, as 333135504 + 1468805625 = 18252^2 + 38325^2 .

It is not a de Polignac number, because 1801941129 - 2³ = 1801941121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1801941093 and 1801941102.

It is not an unprimeable number, because it can be changed into a prime (1801941121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198622 + ... + 207495.

It is an arithmetic number, because the mean of its divisors is an integer number (118789515).

Almost surely, 2^1801941129 is an apocalyptic number.

It is an amenable number.

1801941129 is a deficient number, since it is larger than the sum of its proper divisors (1049007231).

1801941129 is a wasteful number, since it uses less digits than its factorization.

1801941129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406169 (or 406166 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1801941129 is about 42449.2771316544. The cubic root of 1801941129 is about 1216.8775138263.

The spelling of 1801941129 in words is "one billion, eight hundred one million, nine hundred forty-one thousand, one hundred twenty-nine".