145023534 has 40 divisors (see below), whose sum is σ = 330489720. Its totient is φ = 47518704.

The previous prime is 145023521. The next prime is 145023587. The reversal of 145023534 is 435320541.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 145023498 and 145023507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1972 + ... + 17144.

It is an arithmetic number, because the mean of its divisors is an integer number (8262243).

Almost surely, 2^145023534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145023534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165244860).

145023534 is an abundant number, since it is smaller than the sum of its proper divisors (185466186).

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

145023534 is a wasteful number, since it uses less digits than its factorization.

145023534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15246 (or 15237 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 145023534 is about 12042.5717353064. The cubic root of 145023534 is about 525.3872082260.

The spelling of 145023534 in words is "one hundred forty-five million, twenty-three thousand, five hundred thirty-four".