1812137 has 2 divisors, whose sum is σ = 1812138. Its totient is φ = 1812136.

The previous prime is 1812131. The next prime is 1812157. The reversal of 1812137 is 7312181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371241 + 440896 = 1171^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812137 - 2⁴ = 1812121 is a prime.

It is equal to p₁₃₅₉₂₃ and since 1812137 and 135923 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1812131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906068 + 906069.

It is an arithmetic number, because the mean of its divisors is an integer number (906069).

2^1812137 is an apocalyptic number.

It is an amenable number.

1812137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812137 is an equidigital number, since it uses as much as digits as its factorization.

1812137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 1812137 is about 1346.1563802174. The cubic root of 1812137 is about 121.9168339403.

The spelling of 1812137 in words is "one million, eight hundred twelve thousand, one hundred thirty-seven".