1542491 has 4 divisors (see below), whose sum is σ = 1549632. Its totient is φ = 1535352.

The previous prime is 1542487. The next prime is 1542503. The reversal of 1542491 is 1942451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1942451 = 7 ⋅277493.

It is a cyclic number.

It is not a de Polignac number, because 1542491 - 2² = 1542487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542491.

It is not an unprimeable number, because it can be changed into a prime (1542421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3236 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (387408).

2^1542491 is an apocalyptic number.

1542491 is a deficient number, since it is larger than the sum of its proper divisors (7141).

1542491 is an equidigital number, since it uses as much as digits as its factorization.

1542491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140.

The product of its digits is 1440, while the sum is 26.

The square root of 1542491 is about 1241.9706115686. The cubic root of 1542491 is about 115.5422657232.

The spelling of 1542491 in words is "one million, five hundred forty-two thousand, four hundred ninety-one".