145249886 has 4 divisors (see below), whose sum is σ = 217874832. Its totient is φ = 72624942.

The previous prime is 145249859. The next prime is 145249933. The reversal of 145249886 is 688942541.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145249886.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 36312470 + ... + 36312473.

It is an arithmetic number, because the mean of its divisors is an integer number (54468708).

Almost surely, 2^145249886 is an apocalyptic number.

145249886 is a deficient number, since it is larger than the sum of its proper divisors (72624946).

145249886 is an equidigital number, since it uses as much as digits as its factorization.

145249886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72624945.

The product of its digits is 552960, while the sum is 47.

The square root of 145249886 is about 12051.9660636761. The cubic root of 145249886 is about 525.6604067074.

The spelling of 145249886 in words is "one hundred forty-five million, two hundred forty-nine thousand, eight hundred eighty-six".