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75427242 = 23111142837

75427242 has 16 divisors (see below), whose sum is σ = 164568672. Its totient is φ = 22856720.

The previous prime is 75427241. The next prime is 75427243. The reversal of 75427242 is 24272457.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (75427241) and next prime (75427243).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (75427241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 571353 + ... + 571484.

It is an arithmetic number, because the mean of its divisors is an integer number (10285542).

Almost surely, 275427242 is an apocalyptic number.

75427242 is an abundant number, since it is smaller than the sum of its proper divisors (89141430).

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

75427242 is a wasteful number, since it uses less digits than its factorization.

75427242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142853.

The product of its digits is 31360, while the sum is 33.

The square root of 75427242 is about 8684.8858369008. The cubic root of 75427242 is about 422.5155943499.

Adding to 75427242 its reverse (24272457), we get a palindrome (99699699).

The spelling of 75427242 in words is "seventy-five million, four hundred twenty-seven thousand, two hundred forty-two".

Divisors: 1 2 3 6 11 22 33 66 1142837 2285674 3428511 6857022 12571207 25142414 37713621 75427242