1245091 has 2 divisors, whose sum is σ = 1245092. Its totient is φ = 1245090.

The previous prime is 1245067. The next prime is 1245103. The reversal of 1245091 is 1905421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245091 - 2¹⁷ = 1114019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622545 + 622546.

It is an arithmetic number, because the mean of its divisors is an integer number (622546).

2^1245091 is an apocalyptic number.

1245091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245091 is an equidigital number, since it uses as much as digits as its factorization.

1245091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1245091 is about 1115.8364575510. The cubic root of 1245091 is about 107.5805345679.

The spelling of 1245091 in words is "one million, two hundred forty-five thousand, ninety-one".