145640146 has 16 divisors (see below), whose sum is σ = 228196800. Its totient is φ = 69623568.

The previous prime is 145640137. The next prime is 145640189. The reversal of 145640146 is 641046541.

It is a super-2 number, since 2×145640146² = 42422104253802632, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 6216 + ... + 18163.

It is an arithmetic number, because the mean of its divisors is an integer number (14262300).

Almost surely, 2^145640146 is an apocalyptic number.

145640146 is a deficient number, since it is larger than the sum of its proper divisors (82556654).

145640146 is a wasteful number, since it uses less digits than its factorization.

145640146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24513.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 145640146 is about 12068.1459222202. The cubic root of 145640146 is about 526.1307703024.

Adding to 145640146 its reverse (641046541), we get a palindrome (786686687).

The spelling of 145640146 in words is "one hundred forty-five million, six hundred forty thousand, one hundred forty-six".