152749 has 4 divisors (see below), whose sum is σ = 154336. Its totient is φ = 151164.

The previous prime is 152729. The next prime is 152753. The reversal of 152749 is 947251.

It is a happy number.

152749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 947251 = 281 ⋅3371.

It is a cyclic number.

It is not a de Polignac number, because 152749 - 2⁵ = 152717 is a prime.

It is a Duffinian number.

152749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152729) 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, 639 + ... + 844.

It is an arithmetic number, because the mean of its divisors is an integer number (38584).

2¹⁵²⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

152749 is a deficient number, since it is larger than the sum of its proper divisors (1587).

152749 is a wasteful number, since it uses less digits than its factorization.

152749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its digits is 2520, while the sum is 28.

The square root of 152749 is about 390.8311655946. The cubic root of 152749 is about 53.4555487179.

The spelling of 152749 in words is "one hundred fifty-two thousand, seven hundred forty-nine".