145226978 has 8 divisors (see below), whose sum is σ = 234597468. Its totient is φ = 67027824.

The previous prime is 145226959. The next prime is 145226981. The reversal of 145226978 is 879622541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 104305369 + 40921609 = 10213^2 + 6397^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2792801 + ... + 2792852.

Almost surely, 2^145226978 is an apocalyptic number.

145226978 is a deficient number, since it is larger than the sum of its proper divisors (89370490).

145226978 is a wasteful number, since it uses less digits than its factorization.

145226978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585668.

The product of its digits is 241920, while the sum is 44.

The square root of 145226978 is about 12051.0156418453. The cubic root of 145226978 is about 525.6327705142.

The spelling of 145226978 in words is "one hundred forty-five million, two hundred twenty-six thousand, nine hundred seventy-eight".