1542531 has 4 divisors (see below), whose sum is σ = 2056712. Its totient is φ = 1028352.

The previous prime is 1542523. The next prime is 1542533. The reversal of 1542531 is 1352451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1352451 = 3 ⋅450817.

It is not a de Polignac number, because 1542531 - 2³ = 1542523 is a prime.

It is a super-2 number, since 2×1542531² = 4758803771922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1542498 and 1542507.

It is not an unprimeable number, because it can be changed into a prime (1542533) 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, 257086 + ... + 257091.

It is an arithmetic number, because the mean of its divisors is an integer number (514178).

2^1542531 is an apocalyptic number.

1542531 is a deficient number, since it is larger than the sum of its proper divisors (514181).

1542531 is an equidigital number, since it uses as much as digits as its factorization.

1542531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514180.

The product of its digits is 600, while the sum is 21.

The square root of 1542531 is about 1241.9867149048. The cubic root of 1542531 is about 115.5432644649.

Adding to 1542531 its reverse (1352451), we get a palindrome (2894982).

The spelling of 1542531 in words is "one million, five hundred forty-two thousand, five hundred thirty-one".