1422657 has 8 divisors (see below), whose sum is σ = 2107680. Its totient is φ = 948420.

The previous prime is 1422647. The next prime is 1422661. The reversal of 1422657 is 7562241.

1422657 is a `hidden beast` number, since 1 + 4 + 2 + 2 + 657 = 666.

It is not a de Polignac number, because 1422657 - 2⁶ = 1422593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 52691 = 1422657 / (1 + 4 + 2 + 2 + 6 + 5 + 7).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1422657.

It is not an unprimeable number, because it can be changed into a prime (1422637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26319 + ... + 26372.

It is an arithmetic number, because the mean of its divisors is an integer number (263460).

2^1422657 is an apocalyptic number.

It is an amenable number.

1422657 is a deficient number, since it is larger than the sum of its proper divisors (685023).

1422657 is an equidigital number, since it uses as much as digits as its factorization.

1422657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52700 (or 52694 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1422657 is about 1192.7518601956. The cubic root of 1422657 is about 112.4691470950.

Adding to 1422657 its reverse (7562241), we get a palindrome (8984898).

The spelling of 1422657 in words is "one million, four hundred twenty-two thousand, six hundred fifty-seven".