145521858 has 8 divisors (see below), whose sum is σ = 291043728. Its totient is φ = 48507284.

The previous prime is 145521793. The next prime is 145521863. The reversal of 145521858 is 858125541.

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

145521858 is an admirable number.

It is a super-2 number, since 2×145521858² = 42353222311544328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12126816 + ... + 12126827.

It is an arithmetic number, because the mean of its divisors is an integer number (36380466).

Almost surely, 2^145521858 is an apocalyptic number.

145521858 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145521858 is a wasteful number, since it uses less digits than its factorization.

145521858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24253648.

The product of its digits is 64000, while the sum is 39.

The square root of 145521858 is about 12063.2440910395. The cubic root of 145521858 is about 525.9882917006.

The spelling of 145521858 in words is "one hundred forty-five million, five hundred twenty-one thousand, eight hundred fifty-eight".