155446 has 4 divisors (see below), whose sum is σ = 233172. Its totient is φ = 77722.

The previous prime is 155443. The next prime is 155453. The reversal of 155446 is 644551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644551 = 421 ⋅1531.

It is a self number, because there is not a number n which added to its sum of digits gives 155446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155443) 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, 38860 + ... + 38863.

It is an arithmetic number, because the mean of its divisors is an integer number (58293).

2¹⁵⁵⁴⁴⁶ is an apocalyptic number.

155446 is a deficient number, since it is larger than the sum of its proper divisors (77726).

155446 is an equidigital number, since it uses as much as digits as its factorization.

155446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77725.

The product of its digits is 2400, while the sum is 25.

The square root of 155446 is about 394.2664073948. The cubic root of 155446 is about 53.7683261829.

Adding to 155446 its reverse (644551), we get a palindrome (799997).

It can be divided in two parts, 1554 and 46, that added together give a square (1600 = 40²).

The spelling of 155446 in words is "one hundred fifty-five thousand, four hundred forty-six".