7542489 has 4 divisors (see below), whose sum is σ = 10056656. Its totient is φ = 5028324.

The previous prime is 7542481. The next prime is 7542533. The reversal of 7542489 is 9842457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7542489 - 2³ = 7542481 is a prime.

It is a Duffinian number.

7542489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7542481) 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, 1257079 + ... + 1257084.

It is an arithmetic number, because the mean of its divisors is an integer number (2514164).

Almost surely, 2^7542489 is an apocalyptic number.

It is an amenable number.

7542489 is a deficient number, since it is larger than the sum of its proper divisors (2514167).

7542489 is a wasteful number, since it uses less digits than its factorization.

7542489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514166.

The product of its digits is 80640, while the sum is 39.

The square root of 7542489 is about 2746.3592263213. The cubic root of 7542489 is about 196.1123280182.

Subtracting 7542489 from its reverse (9842457), we obtain a cube (2299968 = 132³).

The spelling of 7542489 in words is "seven million, five hundred forty-two thousand, four hundred eighty-nine".