1522420 has 24 divisors (see below), whose sum is σ = 3223584. Its totient is φ = 603936.

The previous prime is 1522399. The next prime is 1522427. The reversal of 1522420 is 242251.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1522394 and 1522403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3027 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (134316).

2^1522420 is an apocalyptic number.

1522420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1522420 is an abundant number, since it is smaller than the sum of its proper divisors (1701164).

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

1522420 is a wasteful number, since it uses less digits than its factorization.

1522420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1522420 is about 1233.8638498635. The cubic root of 1522420 is about 115.0389282199.

Adding to 1522420 its reverse (242251), we get a palindrome (1764671).

The spelling of 1522420 in words is "one million, five hundred twenty-two thousand, four hundred twenty".