1252991 has 2 divisors, whose sum is σ = 1252992. Its totient is φ = 1252990.

The previous prime is 1252987. The next prime is 1252997. The reversal of 1252991 is 1992521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1252991 - 2² = 1252987 is a prime.

It is a Sophie Germain prime.

It is equal to p₉₆₆₇₁ and since 1252991 and 96671 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626495 + 626496.

It is an arithmetic number, because the mean of its divisors is an integer number (626496).

2^1252991 is an apocalyptic number.

1252991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252991 is an equidigital number, since it uses as much as digits as its factorization.

1252991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 29.

The square root of 1252991 is about 1119.3708054081. The cubic root of 1252991 is about 107.8075849191.

The spelling of 1252991 in words is "one million, two hundred fifty-two thousand, nine hundred ninety-one".