1974149 has 2 divisors, whose sum is σ = 1974150. Its totient is φ = 1974148.

The previous prime is 1974121. The next prime is 1974163. The reversal of 1974149 is 9414791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1643524 + 330625 = 1282^2 + 575^2 .

It is an emirp because it is prime and its reverse (9414791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1974149 - 2⁸ = 1973893 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987074 + 987075.

It is an arithmetic number, because the mean of its divisors is an integer number (987075).

2^1974149 is an apocalyptic number.

It is an amenable number.

1974149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974149 is an equidigital number, since it uses as much as digits as its factorization.

1974149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 1974149 is about 1405.0441274209. The cubic root of 1974149 is about 125.4469122513.

The spelling of 1974149 in words is "one million, nine hundred seventy-four thousand, one hundred forty-nine".