981145 has 8 divisors (see below), whose sum is σ = 1284480. Its totient is φ = 713520.

The previous prime is 981139. The next prime is 981151. The reversal of 981145 is 541189.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (981139) and next prime (981151).

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

It is not a de Polignac number, because 981145 - 2³ = 981137 is a prime.

It is a super-2 number, since 2×981145² = 1925291022050, which contains 22 as substring.

981145 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8865 + ... + 8974.

It is an arithmetic number, because the mean of its divisors is an integer number (160560).

2⁹⁸¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

981145 is a deficient number, since it is larger than the sum of its proper divisors (303335).

981145 is a wasteful number, since it uses less digits than its factorization.

981145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17855.

The product of its digits is 1440, while the sum is 28.

The square root of 981145 is about 990.5276371712. The cubic root of 981145 is about 99.3675079726.

The spelling of 981145 in words is "nine hundred eighty-one thousand, one hundred forty-five".