1145998 has 16 divisors (see below), whose sum is σ = 2050560. Its totient is φ = 469656.

The previous prime is 1145983. The next prime is 1145999. The reversal of 1145998 is 8995411.

It is a super-2 number, since 2×1145998² = 2626622832008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (128160).

2^1145998 is an apocalyptic number.

1145998 is a deficient number, since it is larger than the sum of its proper divisors (904562).

1145998 is a wasteful number, since it uses less digits than its factorization.

1145998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591.

The product of its digits is 12960, while the sum is 37.

The square root of 1145998 is about 1070.5129611546. The cubic root of 1145998 is about 104.6472820787.

The spelling of 1145998 in words is "one million, one hundred forty-five thousand, nine hundred ninety-eight".