1145391 has 16 divisors (see below), whose sum is σ = 1685376. Its totient is φ = 687456.

The previous prime is 1145387. The next prime is 1145393. The reversal of 1145391 is 1935411.

1145391 = 35² + 36² + ... + 151².

It is not a de Polignac number, because 1145391 - 2² = 1145387 is a prime.

1145391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1336 + ... + 2018.

It is an arithmetic number, because the mean of its divisors is an integer number (105336).

2^1145391 is an apocalyptic number.

1145391 is a deficient number, since it is larger than the sum of its proper divisors (539985).

1145391 is a wasteful number, since it uses less digits than its factorization.

1145391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742.

The product of its digits is 540, while the sum is 24.

The square root of 1145391 is about 1070.2294146584. The cubic root of 1145391 is about 104.6288026635.

The spelling of 1145391 in words is "one million, one hundred forty-five thousand, three hundred ninety-one".