145861858 has 8 divisors (see below), whose sum is σ = 222379740. Its totient is φ = 71735280.

The previous prime is 145861831. The next prime is 145861867. The reversal of 145861858 is 858168541.

It can be written as a sum of positive squares in 2 ways, for example, as 136819809 + 9042049 = 11697^2 + 3007^2 .

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

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, 597673 + ... + 597916.

Almost surely, 2^145861858 is an apocalyptic number.

145861858 is a deficient number, since it is larger than the sum of its proper divisors (76517882).

145861858 is a wasteful number, since it uses less digits than its factorization.

145861858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195652.

The product of its digits is 307200, while the sum is 46.

The square root of 145861858 is about 12077.3282641485. The cubic root of 145861858 is about 526.3976160535.

The spelling of 145861858 in words is "one hundred forty-five million, eight hundred sixty-one thousand, eight hundred fifty-eight".