1949257 has 2 divisors, whose sum is σ = 1949258. Its totient is φ = 1949256.

The previous prime is 1949251. The next prime is 1949309. The reversal of 1949257 is 7529491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1948816 + 441 = 1396^2 + 21^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949257 is a prime.

1949257 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1949251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974628 + 974629.

It is an arithmetic number, because the mean of its divisors is an integer number (974629).

2^1949257 is an apocalyptic number.

It is an amenable number.

1949257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949257 is an equidigital number, since it uses as much as digits as its factorization.

1949257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 1949257 is about 1396.1579423547. The cubic root of 1949257 is about 124.9174281338.

The spelling of 1949257 in words is "one million, nine hundred forty-nine thousand, two hundred fifty-seven".