155247 has 4 divisors (see below), whose sum is σ = 207000. Its totient is φ = 103496.

The previous prime is 155231. The next prime is 155251. The reversal of 155247 is 742551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155247 - 2⁴ = 155231 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155247.

It is not an unprimeable number, because it can be changed into a prime (155047) 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, 25872 + ... + 25877.

It is an arithmetic number, because the mean of its divisors is an integer number (51750).

2¹⁵⁵²⁴⁷ is an apocalyptic number.

155247 is a deficient number, since it is larger than the sum of its proper divisors (51753).

155247 is an equidigital number, since it uses as much as digits as its factorization.

155247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51752.

The product of its digits is 1400, while the sum is 24.

The square root of 155247 is about 394.0139591436. The cubic root of 155247 is about 53.7453718748.

Adding to 155247 its reverse (742551), we get a palindrome (897798).

The spelling of 155247 in words is "one hundred fifty-five thousand, two hundred forty-seven".