145423146 has 64 divisors (see below), whose sum is σ = 330728832. Its totient is φ = 42240000.

The previous prime is 145423111. The next prime is 145423147. The reversal of 145423146 is 641324541.

It is a super-2 number, since 2×145423146² = 42295782785074632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145423147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164626 + ... + 165506.

It is an arithmetic number, because the mean of its divisors is an integer number (5167638).

Almost surely, 2^145423146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145423146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165364416).

145423146 is an abundant number, since it is smaller than the sum of its proper divisors (185305686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145423146 is a wasteful number, since it uses less digits than its factorization.

145423146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its digits is 11520, while the sum is 30.

The square root of 145423146 is about 12059.1519602334. The cubic root of 145423146 is about 525.8693333958.

Adding to 145423146 its reverse (641324541), we get a palindrome (786747687).

The spelling of 145423146 in words is "one hundred forty-five million, four hundred twenty-three thousand, one hundred forty-six".