1142457 has 4 divisors (see below), whose sum is σ = 1523280. Its totient is φ = 761636.

The previous prime is 1142431. The next prime is 1142473. The reversal of 1142457 is 7542411.

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 not a de Polignac number, because 1142457 - 2⁸ = 1142201 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1142357) 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, 190407 + ... + 190412.

It is an arithmetic number, because the mean of its divisors is an integer number (380820).

2^1142457 is an apocalyptic number.

It is an amenable number.

1142457 is a deficient number, since it is larger than the sum of its proper divisors (380823).

1142457 is an equidigital number, since it uses as much as digits as its factorization.

1142457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380822.

The product of its digits is 1120, while the sum is 24.

The square root of 1142457 is about 1068.8578015807. The cubic root of 1142457 is about 104.5393882486.

Adding to 1142457 its reverse (7542411), we get a palindrome (8684868).

The spelling of 1142457 in words is "one million, one hundred forty-two thousand, four hundred fifty-seven".