1542457 has 4 divisors (see below), whose sum is σ = 1762816. Its totient is φ = 1322100.

The previous prime is 1542451. The next prime is 1542473. The reversal of 1542457 is 7542451.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110169 + ... + 110182.

It is an arithmetic number, because the mean of its divisors is an integer number (440704).

2^1542457 is an apocalyptic number.

It is an amenable number.

1542457 is a deficient number, since it is larger than the sum of its proper divisors (220359).

1542457 is an equidigital number, since it uses as much as digits as its factorization.

1542457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220358.

The product of its digits is 5600, while the sum is 28.

The square root of 1542457 is about 1241.9569235686. The cubic root of 1542457 is about 115.5414167791.

It can be divided in two parts, 154245 and 7, that multiplied together give a triangular number (1079715 = T₁₄₆₉).

The spelling of 1542457 in words is "one million, five hundred forty-two thousand, four hundred fifty-seven".