145727746 has 4 divisors (see below), whose sum is σ = 218591622. Its totient is φ = 72863872.

The previous prime is 145727741. The next prime is 145727759. The reversal of 145727746 is 647727541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 647727541 = 23 ⋅28162067.

It can be written as a sum of positive squares in only one way, i.e., 133749225 + 11978521 = 11565^2 + 3461^2 .

It is not an unprimeable number, because it can be changed into a prime (145727741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36431935 + ... + 36431938.

Almost surely, 2^145727746 is an apocalyptic number.

145727746 is a deficient number, since it is larger than the sum of its proper divisors (72863876).

145727746 is an equidigital number, since it uses as much as digits as its factorization.

145727746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72863875.

The product of its digits is 329280, while the sum is 43.

The square root of 145727746 is about 12071.7747659572. The cubic root of 145727746 is about 526.2362353116.

The spelling of 145727746 in words is "one hundred forty-five million, seven hundred twenty-seven thousand, seven hundred forty-six".