145415138 has 12 divisors (see below), whose sum is σ = 239755110. Its totient is φ = 66097680.

The previous prime is 145415129. The next prime is 145415159. The reversal of 145415138 is 831514541.

It can be written as a sum of positive squares in only one way, i.e., 129117769 + 16297369 = 11363^2 + 4037^2 .

It is a super-2 number, since 2×145415138² = 42291124719118088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300203 + ... + 300686.

Almost surely, 2^145415138 is an apocalyptic number.

145415138 is a deficient number, since it is larger than the sum of its proper divisors (94339972).

145415138 is a wasteful number, since it uses less digits than its factorization.

145415138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600913 (or 600902 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 145415138 is about 12058.8199256810. The cubic root of 145415138 is about 525.8596805561.

Adding to 145415138 its reverse (831514541), we get a palindrome (976929679).

The spelling of 145415138 in words is "one hundred forty-five million, four hundred fifteen thousand, one hundred thirty-eight".