7542427 has 4 divisors (see below), whose sum is σ = 7560280. Its totient is φ = 7524576.

The previous prime is 7542389. The next prime is 7542439. The reversal of 7542427 is 7242457.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7542427 - 2¹⁹ = 7018139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7542727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8277 + ... + 9142.

It is an arithmetic number, because the mean of its divisors is an integer number (1890070).

Almost surely, 2^7542427 is an apocalyptic number.

7542427 is a deficient number, since it is larger than the sum of its proper divisors (17853).

7542427 is a wasteful number, since it uses less digits than its factorization.

7542427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17852.

The product of its digits is 15680, while the sum is 31.

The square root of 7542427 is about 2746.3479386269. The cubic root of 7542427 is about 196.1117906625. Note that the first 3 decimals are identical.

The spelling of 7542427 in words is "seven million, five hundred forty-two thousand, four hundred twenty-seven".