1145261 has 8 divisors (see below), whose sum is σ = 1267224. Its totient is φ = 1028160.

The previous prime is 1145227. The next prime is 1145269. The reversal of 1145261 is 1625411.

It can be written as a sum of positive squares in 4 ways, for example, as 2500 + 1142761 = 50^2 + 1069^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145261 - 2¹⁸ = 883117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (158403).

2^1145261 is an apocalyptic number.

It is an amenable number.

1145261 is a deficient number, since it is larger than the sum of its proper divisors (121963).

1145261 is a wasteful number, since it uses less digits than its factorization.

1145261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its digits is 240, while the sum is 20.

The square root of 1145261 is about 1070.1686782933. The cubic root of 1145261 is about 104.6248441146.

The spelling of 1145261 in words is "one million, one hundred forty-five thousand, two hundred sixty-one".