1145149 has 4 divisors (see below), whose sum is σ = 1205440. Its totient is φ = 1084860.

The previous prime is 1145143. The next prime is 1145173. The reversal of 1145149 is 9415411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9415411 = 61 ⋅154351.

It is a cyclic number.

It is not a de Polignac number, because 1145149 - 2³ = 1145141 is a prime.

It is a super-2 number, since 2×1145149² = 2622732464402, 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 (1145141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30117 + ... + 30154.

It is an arithmetic number, because the mean of its divisors is an integer number (301360).

2^1145149 is an apocalyptic number.

1145149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1145149 is a deficient number, since it is larger than the sum of its proper divisors (60291).

1145149 is an equidigital number, since it uses as much as digits as its factorization.

1145149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60290.

The product of its digits is 720, while the sum is 25.

The square root of 1145149 is about 1070.1163488145. The cubic root of 1145149 is about 104.6214334322.

It can be divided in two parts, 114 and 5149, that multiplied together give a triangular number (586986 = T₁₀₈₃).

The spelling of 1145149 in words is "one million, one hundred forty-five thousand, one hundred forty-nine".