1145207 has 4 divisors (see below), whose sum is σ = 1308816. Its totient is φ = 981600.

The previous prime is 1145203. The next prime is 1145213. The reversal of 1145207 is 7025411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7025411 = 2161 ⋅3251.

It is a cyclic number.

It is not a de Polignac number, because 1145207 - 2² = 1145203 is a prime.

It is a super-2 number, since 2×1145207² = 2622998145698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145203) 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 in 3 ways as a sum of consecutive naturals, for example, 81794 + ... + 81807.

It is an arithmetic number, because the mean of its divisors is an integer number (327204).

2^1145207 is an apocalyptic number.

1145207 is a deficient number, since it is larger than the sum of its proper divisors (163609).

1145207 is an equidigital number, since it uses as much as digits as its factorization.

1145207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163608.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1145207 is about 1070.1434483283. The cubic root of 1145207 is about 104.6231997062.

The spelling of 1145207 in words is "one million, one hundred forty-five thousand, two hundred seven".