1422387 has 16 divisors (see below), whose sum is σ = 2128000. Its totient is φ = 938952.

The previous prime is 1422367. The next prime is 1422409. The reversal of 1422387 is 7832241.

It is a de Polignac number, because none of the positive numbers 2^k-1422387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1422387.

It is not an unprimeable number, because it can be changed into a prime (1422367) 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 15 ways as a sum of consecutive naturals, for example, 3564 + ... + 3942.

It is an arithmetic number, because the mean of its divisors is an integer number (133000).

2^1422387 is an apocalyptic number.

1422387 is a deficient number, since it is larger than the sum of its proper divisors (705613).

1422387 is a wasteful number, since it uses less digits than its factorization.

1422387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 521 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1422387 is about 1192.6386711825. The cubic root of 1422387 is about 112.4620316317.

The spelling of 1422387 in words is "one million, four hundred twenty-two thousand, three hundred eighty-seven".