33142725 has 72 divisors (see below), whose sum is σ = 74048832. Its totient is φ = 13766400.

The previous prime is 33142717. The next prime is 33142757. The reversal of 33142725 is 52724133.

It is not a de Polignac number, because 33142725 - 2³ = 33142717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16369 + ... + 18281.

It is an arithmetic number, because the mean of its divisors is an integer number (1028456).

Almost surely, 2^33142725 is an apocalyptic number.

33142725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

33142725 is an abundant number, since it is smaller than the sum of its proper divisors (40906107).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33142725 is a wasteful number, since it uses less digits than its factorization.

33142725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1939 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 33142725 is about 5756.9718602752. The cubic root of 33142725 is about 321.2151874746.

Adding to 33142725 its reverse (52724133), we get a palindrome (85866858).

The spelling of 33142725 in words is "thirty-three million, one hundred forty-two thousand, seven hundred twenty-five".