1858061 has 2 divisors, whose sum is σ = 1858062. Its totient is φ = 1858060.

The previous prime is 1858057. The next prime is 1858081. The reversal of 1858061 is 1608581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1485961 + 372100 = 1219^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1858061 - 2² = 1858057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1858081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929030 + 929031.

It is an arithmetic number, because the mean of its divisors is an integer number (929031).

2^1858061 is an apocalyptic number.

It is an amenable number.

1858061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1858061 is an equidigital number, since it uses as much as digits as its factorization.

1858061 is an evil number, because the sum of its binary digits is even.

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

The square root of 1858061 is about 1363.1071124457. The cubic root of 1858061 is about 122.9381450289.

The spelling of 1858061 in words is "one million, eight hundred fifty-eight thousand, sixty-one".