1553542 has 8 divisors (see below), whose sum is σ = 2342736. Its totient is φ = 772632.

The previous prime is 1553537. The next prime is 1553543. The reversal of 1553542 is 2453551.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553543) 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 in 3 ways as a sum of consecutive naturals, for example, 1578 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (292842).

2^1553542 is an apocalyptic number.

1553542 is a deficient number, since it is larger than the sum of its proper divisors (789194).

1553542 is a wasteful number, since it uses less digits than its factorization.

1553542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142.

The product of its digits is 3000, while the sum is 25.

The square root of 1553542 is about 1246.4116494963. The cubic root of 1553542 is about 115.8175391516.

Subtracting 1553542 from its reverse (2453551), we obtain a palindrome (900009).

The spelling of 1553542 in words is "one million, five hundred fifty-three thousand, five hundred forty-two".