1850129 has 2 divisors, whose sum is σ = 1850130. Its totient is φ = 1850128.

The previous prime is 1850119. The next prime is 1850131. The reversal of 1850129 is 9210581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 529 = 1360^2 + 23^2 .

It is an emirp because it is prime and its reverse (9210581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1850129 is a prime.

Together with 1850131, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1850098 and 1850107.

It is not a weakly prime, because it can be changed into another prime (1850119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925064 + 925065.

It is an arithmetic number, because the mean of its divisors is an integer number (925065).

2^1850129 is an apocalyptic number.

It is an amenable number.

1850129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850129 is an equidigital number, since it uses as much as digits as its factorization.

1850129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1850129 is about 1360.1944713900. The cubic root of 1850129 is about 122.7629558958.

The spelling of 1850129 in words is "one million, eight hundred fifty thousand, one hundred twenty-nine".