145405452 has 12 divisors (see below), whose sum is σ = 339279416. Its totient is φ = 48468480.

The previous prime is 145405367. The next prime is 145405457. The reversal of 145405452 is 254504541.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×145405452² = 42285490942648608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145405457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6058549 + ... + 6058572.

Almost surely, 2^145405452 is an apocalyptic number.

145405452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145405452 is an abundant number, since it is smaller than the sum of its proper divisors (193873964).

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

145405452 is a wasteful number, since it uses less digits than its factorization.

145405452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12117128 (or 12117126 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 145405452 is about 12058.4183042387. The cubic root of 145405452 is about 525.8480045825.

Adding to 145405452 its reverse (254504541), we get a palindrome (399909993).

The spelling of 145405452 in words is "one hundred forty-five million, four hundred five thousand, four hundred fifty-two".