145657138 has 12 divisors (see below), whose sum is σ = 240154110. Its totient is φ = 66207680.

The previous prime is 145657093. The next prime is 145657147. The reversal of 145657138 is 831756541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 114554209 + 31102929 = 10703^2 + 5577^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145657138.

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 5 ways as a sum of consecutive naturals, for example, 300703 + ... + 301186.

Almost surely, 2^145657138 is an apocalyptic number.

145657138 is a deficient number, since it is larger than the sum of its proper divisors (94496972).

145657138 is a wasteful number, since it uses less digits than its factorization.

145657138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601913 (or 601902 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 145657138 is about 12068.8499037812. The cubic root of 145657138 is about 526.1512309301.

The spelling of 145657138 in words is "one hundred forty-five million, six hundred fifty-seven thousand, one hundred thirty-eight".