251149 has 2 divisors, whose sum is σ = 251150.
Its totient is φ = 251148.
The previous prime is 251143. The next prime is 251159. The reversal of 251149 is 941152.
It can be divided in two parts, 251 and 149, that added together give a square (400 = 202).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 243049 + 8100 = 493^2 + 90^2
It is a cyclic number.
It is not a de Polignac number, because 251149 - 25 = 251117 is a prime.
It is a Chen prime.
251149 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (251143) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125574 + 125575.
It is an arithmetic number, because the mean of its divisors is an integer number (125575).
2251149 is an apocalyptic number.
It is an amenable number.
251149 is a deficient number, since it is larger than the sum of its proper divisors (1).
251149 is an equidigital number, since it uses as much as digits as its factorization.
251149 is an evil number, because the sum of its binary digits is even.
The product of its digits is 360, while the sum is 22.
The square root of 251149 is about 501.1476828241.
The cubic root of 251149 is about 63.0924149703.
The spelling of 251149 in words is "two hundred fifty-one thousand, one hundred forty-nine".