1422457 has 4 divisors (see below), whose sum is σ = 1424896. Its totient is φ = 1420020.

The previous prime is 1422439. The next prime is 1422461. The reversal of 1422457 is 7542241.

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-1422457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1422437) 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, 232 + ... + 1702.

It is an arithmetic number, because the mean of its divisors is an integer number (356224).

2^1422457 is an apocalyptic number.

It is an amenable number.

1422457 is a deficient number, since it is larger than the sum of its proper divisors (2439).

1422457 is an equidigital number, since it uses as much as digits as its factorization.

1422457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438.

The product of its digits is 2240, while the sum is 25.

The square root of 1422457 is about 1192.6680175137. The cubic root of 1422457 is about 112.4638764679.

Adding to 1422457 its reverse (7542241), we get a palindrome (8964698).

The spelling of 1422457 in words is "one million, four hundred twenty-two thousand, four hundred fifty-seven".