145381252 has 24 divisors (see below), whose sum is σ = 269127936. Its totient is φ = 68574528.

The previous prime is 145381219. The next prime is 145381259. The reversal of 145381252 is 252183541.

It is a super-2 number, since 2×145381252² = 42271416866175008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145381259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4108 + ... + 17539.

It is an arithmetic number, because the mean of its divisors is an integer number (11213664).

Almost surely, 2^145381252 is an apocalyptic number.

It is an amenable number.

145381252 is a deficient number, since it is larger than the sum of its proper divisors (123746684).

145381252 is a wasteful number, since it uses less digits than its factorization.

145381252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21747 (or 21745 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 145381252 is about 12057.4148141299. The cubic root of 145381252 is about 525.8188304638.

The spelling of 145381252 in words is "one hundred forty-five million, three hundred eighty-one thousand, two hundred fifty-two".