1457842 has 4 divisors (see below), whose sum is σ = 2186766. Its totient is φ = 728920.

The previous prime is 1457821. The next prime is 1457849. The reversal of 1457842 is 2487541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2487541 = 7 ⋅355363.

It can be written as a sum of positive squares in only one way, i.e., 1320201 + 137641 = 1149^2 + 371^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1457849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364459 + ... + 364462.

2^1457842 is an apocalyptic number.

1457842 is a deficient number, since it is larger than the sum of its proper divisors (728924).

1457842 is an equidigital number, since it uses as much as digits as its factorization.

1457842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728923.

The product of its digits is 8960, while the sum is 31.

The square root of 1457842 is about 1207.4112803846. The cubic root of 1457842 is about 113.3887983029.

The spelling of 1457842 in words is "one million, four hundred fifty-seven thousand, eight hundred forty-two".