145773481 has 24 divisors (see below), whose sum is σ = 174321504. Its totient is φ = 121504320.

The previous prime is 145773473. The next prime is 145773533. The reversal of 145773481 is 184377541.

It is a happy number.

It is not a de Polignac number, because 145773481 - 2³ = 145773473 is a prime.

It is a super-2 number, since 2×145773481² = 42499815525714722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145773281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296646 + ... + 297136.

It is an arithmetic number, because the mean of its divisors is an integer number (7263396).

Almost surely, 2^145773481 is an apocalyptic number.

It is an amenable number.

145773481 is a deficient number, since it is larger than the sum of its proper divisors (28548023).

145773481 is an equidigital number, since it uses as much as digits as its factorization.

145773481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 654 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 145773481 is about 12073.6689121410. The cubic root of 145773481 is about 526.2912806445.

The spelling of 145773481 in words is "one hundred forty-five million, seven hundred seventy-three thousand, four hundred eighty-one".