145820494 has 4 divisors (see below), whose sum is σ = 218730744. Its totient is φ = 72910246.

The previous prime is 145820453. The next prime is 145820531. The reversal of 145820494 is 494028541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 494028541 = 1303 ⋅379147.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36455122 + ... + 36455125.

It is an arithmetic number, because the mean of its divisors is an integer number (54682686).

Almost surely, 2^145820494 is an apocalyptic number.

145820494 is a deficient number, since it is larger than the sum of its proper divisors (72910250).

145820494 is an equidigital number, since it uses as much as digits as its factorization.

145820494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72910249.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 145820494 is about 12075.6156778857. The cubic root of 145820494 is about 526.3478521425.

It can be divided in two parts, 1458 and 20494, that added together give a cube (21952 = 28³).

The spelling of 145820494 in words is "one hundred forty-five million, eight hundred twenty thousand, four hundred ninety-four".