1620126 has 12 divisors (see below), whose sum is σ = 3510312. Its totient is φ = 540036.

The previous prime is 1620121. The next prime is 1620133. The reversal of 1620126 is 6210261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 90007 = 1620126 / (1 + 6 + 2 + 0 + 1 + 2 + 6).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1620099 and 1620108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620121) 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 5 ways as a sum of consecutive naturals, for example, 44986 + ... + 45021.

It is an arithmetic number, because the mean of its divisors is an integer number (292526).

2^1620126 is an apocalyptic number.

1620126 is an abundant number, since it is smaller than the sum of its proper divisors (1890186).

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

1620126 is a wasteful number, since it uses less digits than its factorization.

1620126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90015 (or 90012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1620126 is about 1272.8417026481. The cubic root of 1620126 is about 117.4490740532.

Adding to 1620126 its reverse (6210261), we get a palindrome (7830387).

The spelling of 1620126 in words is "one million, six hundred twenty thousand, one hundred twenty-six".