75144642 has 32 divisors (see below), whose sum is σ = 154828800. Its totient is φ = 24302928.

The previous prime is 75144617. The next prime is 75144647. The reversal of 75144642 is 24644157.

It is not an unprimeable number, because it can be changed into a prime (75144647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26623 + ... + 29309.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^75144642 is an apocalyptic number.

75144642 is an abundant number, since it is smaller than the sum of its proper divisors (79684158).

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

75144642 is a wasteful number, since it uses less digits than its factorization.

75144642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830.

The product of its digits is 26880, while the sum is 33.

The square root of 75144642 is about 8668.6009251782. The cubic root of 75144642 is about 421.9872603089.

Adding to 75144642 its reverse (24644157), we get a palindrome (99788799).

The spelling of 75144642 in words is "seventy-five million, one hundred forty-four thousand, six hundred forty-two".