1622540 has 24 divisors (see below), whose sum is σ = 3518592. Its totient is φ = 627840.

The previous prime is 1622483. The next prime is 1622549. The reversal of 1622540 is 452261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1622549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 1928.

It is an arithmetic number, because the mean of its divisors is an integer number (146608).

2^1622540 is an apocalyptic number.

1622540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1622540 is an abundant number, since it is smaller than the sum of its proper divisors (1896052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1622540 is a wasteful number, since it uses less digits than its factorization.

1622540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657 (or 2655 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1622540 is about 1273.7896215624. The cubic root of 1622540 is about 117.5073784411.

The spelling of 1622540 in words is "one million, six hundred twenty-two thousand, five hundred forty".