145994 has 4 divisors (see below), whose sum is σ = 218994. Its totient is φ = 72996.
The previous prime is 145991. The next prime is 146009. The reversal of 145994 is 499541.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499541 = 7 ⋅71363.
It can be written as a sum of positive squares in only one way, i.e., 133225 + 12769 = 365^2 + 113^2 .
It is a self number, because there is not a number n which added to its sum of digits gives 145994.
It is not an unprimeable number, because it can be changed into a prime (145991) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36497 + ... + 36500.
2145994 is an apocalyptic number.
145994 is a deficient number, since it is larger than the sum of its proper divisors (73000).
145994 is an equidigital number, since it uses as much as digits as its factorization.
145994 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 72999.
The product of its digits is 6480, while the sum is 32.
The square root of 145994 is about 382.0916120514. The cubic root of 145994 is about 52.6556529516.
The spelling of 145994 in words is "one hundred forty-five thousand, nine hundred ninety-four".
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