145732749 has 4 divisors (see below), whose sum is σ = 194310336. Its totient is φ = 97155164.

The previous prime is 145732733. The next prime is 145732757. The reversal of 145732749 is 947237541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145732749 - 2⁴ = 145732733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145732749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145732709) 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, 24288789 + ... + 24288794.

It is an arithmetic number, because the mean of its divisors is an integer number (48577584).

Almost surely, 2^145732749 is an apocalyptic number.

It is an amenable number.

145732749 is a deficient number, since it is larger than the sum of its proper divisors (48577587).

145732749 is an equidigital number, since it uses as much as digits as its factorization.

145732749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48577586.

The product of its digits is 211680, while the sum is 42.

The square root of 145732749 is about 12071.9819830879. The cubic root of 145732749 is about 526.2422573397.

The spelling of 145732749 in words is "one hundred forty-five million, seven hundred thirty-two thousand, seven hundred forty-nine".