1203149 has 2 divisors, whose sum is σ = 1203150. Its totient is φ = 1203148.

The previous prime is 1203127. The next prime is 1203151. The reversal of 1203149 is 9413021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 47524 = 1075^2 + 218^2 .

It is an emirp because it is prime and its reverse (9413021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203149 - 2¹⁶ = 1137613 is a prime.

Together with 1203151, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1203149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601574 + 601575.

It is an arithmetic number, because the mean of its divisors is an integer number (601575).

2^1203149 is an apocalyptic number.

It is an amenable number.

1203149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203149 is an equidigital number, since it uses as much as digits as its factorization.

1203149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1203149 is about 1096.8814885848. The cubic root of 1203149 is about 106.3587288350.

The spelling of 1203149 in words is "one million, two hundred three thousand, one hundred forty-nine".