153442 has 8 divisors (see below), whose sum is σ = 243756. Its totient is φ = 72192.

The previous prime is 153437. The next prime is 153443. The reversal of 153442 is 244351.

153442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 8281 = 381^2 + 91^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (153443) by changing a digit.

153442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223 + ... + 2290.

2¹⁵³⁴⁴² is an apocalyptic number.

153442 is a deficient number, since it is larger than the sum of its proper divisors (90314).

153442 is a wasteful number, since it uses less digits than its factorization.

153442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532.

The product of its digits is 480, while the sum is 19.

The square root of 153442 is about 391.7167343885. The cubic root of 153442 is about 53.5362667889.

Adding to 153442 its reverse (244351), we get a palindrome (397793).

Subtracting 153442 from its reverse (244351), we obtain a palindrome (90909).

It can be divided in two parts, 153 and 442, that added together give a palindrome (595).

The spelling of 153442 in words is "one hundred fifty-three thousand, four hundred forty-two".