145252778 has 8 divisors (see below), whose sum is σ = 237686400. Its totient is φ = 66023980.

The previous prime is 145252741. The next prime is 145252781. The reversal of 145252778 is 877252541.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3301178 + ... + 3301221.

It is an arithmetic number, because the mean of its divisors is an integer number (29710800).

Almost surely, 2^145252778 is an apocalyptic number.

145252778 is a deficient number, since it is larger than the sum of its proper divisors (92433622).

145252778 is a wasteful number, since it uses less digits than its factorization.

145252778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602412.

The product of its digits is 156800, while the sum is 41.

The square root of 145252778 is about 12052.0860435030. The cubic root of 145252778 is about 525.6638954073.

The spelling of 145252778 in words is "one hundred forty-five million, two hundred fifty-two thousand, seven hundred seventy-eight".