1542431 has 4 divisors (see below), whose sum is σ = 1682664. Its totient is φ = 1402200.

The previous prime is 1542421. The next prime is 1542433. The reversal of 1542431 is 1342451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342451 = 11 ⋅122041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542431 is a prime.

It is a super-2 number, since 2×1542431² = 4758186779522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542433) 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, 70100 + ... + 70121.

It is an arithmetic number, because the mean of its divisors is an integer number (420666).

2^1542431 is an apocalyptic number.

1542431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1542431 is a deficient number, since it is larger than the sum of its proper divisors (140233).

1542431 is a wasteful number, since it uses less digits than its factorization.

1542431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140232.

The product of its digits is 480, while the sum is 20.

The square root of 1542431 is about 1241.9464561727. The cubic root of 1542431 is about 115.5407675781.

Adding to 1542431 its sum of digits (20), we get a palindrome (1542451).

Adding to 1542431 its reverse (1342451), we get a palindrome (2884882).

The spelling of 1542431 in words is "one million, five hundred forty-two thousand, four hundred thirty-one".