145431306 has 24 divisors (see below), whose sum is σ = 315359460. Its totient is φ = 48437376.

The previous prime is 145431287. The next prime is 145431329. The reversal of 145431306 is 603134541.

It can be written as a sum of positive squares in 2 ways, for example, as 145082025 + 349281 = 12045^2 + 591^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145431306.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26530 + ... + 31538.

Almost surely, 2^145431306 is an apocalyptic number.

145431306 is an abundant number, since it is smaller than the sum of its proper divisors (169928154).

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

145431306 is a wasteful number, since it uses less digits than its factorization.

145431306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630 (or 6627 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 145431306 is about 12059.4902877360. The cubic root of 145431306 is about 525.8791690916.

Adding to 145431306 its reverse (603134541), we get a palindrome (748565847).

The spelling of 145431306 in words is "one hundred forty-five million, four hundred thirty-one thousand, three hundred six".