145522 has 16 divisors (see below), whose sum is σ = 244440. Its totient is φ = 64512.

The previous prime is 145517. The next prime is 145531. The reversal of 145522 is 225541.

It can be written as a sum of positive squares in 4 ways, for example, as 83521 + 62001 = 289^2 + 249^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145522.

It is an unprimeable number.

145522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658 + ... + 850.

2¹⁴⁵⁵²² is an apocalyptic number.

145522 is a deficient number, since it is larger than the sum of its proper divisors (98918).

145522 is a wasteful number, since it uses less digits than its factorization.

145522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its digits is 400, while the sum is 19.

The square root of 145522 is about 381.4734591030. The cubic root of 145522 is about 52.5988462787.

Adding to 145522 its sum of digits (19), we get a palindrome (145541).

The spelling of 145522 in words is "one hundred forty-five thousand, five hundred twenty-two".