145172642 has 16 divisors (see below), whose sum is σ = 228318912. Its totient is φ = 69096720.

The previous prime is 145172633. The next prime is 145172669. The reversal of 145172642 is 246271541.

It is a junction number, because it is equal to n+sod(n) for n = 145172599 and 145172608.

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 7 ways as a sum of consecutive naturals, for example, 2228 + ... + 17184.

It is an arithmetic number, because the mean of its divisors is an integer number (14269932).

Almost surely, 2^145172642 is an apocalyptic number.

145172642 is a deficient number, since it is larger than the sum of its proper divisors (83146270).

145172642 is a wasteful number, since it uses less digits than its factorization.

145172642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15193.

The product of its digits is 13440, while the sum is 32.

The square root of 145172642 is about 12048.7610151418. The cubic root of 145172642 is about 525.5672079828.

The spelling of 145172642 in words is "one hundred forty-five million, one hundred seventy-two thousand, six hundred forty-two".