1525420 has 24 divisors (see below), whose sum is σ = 3450384. Its totient is φ = 563136.

The previous prime is 1525409. The next prime is 1525421. The reversal of 1525420 is 245251.

It is not an unprimeable number, because it can be changed into a prime (1525421) 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 7 ways as a sum of consecutive naturals, for example, 2674 + ... + 3193.

It is an arithmetic number, because the mean of its divisors is an integer number (143766).

2^1525420 is an apocalyptic number.

1525420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525420 is an abundant number, since it is smaller than the sum of its proper divisors (1924964).

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

1525420 is a wasteful number, since it uses less digits than its factorization.

1525420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889 (or 5887 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1525420 is about 1235.0789448452. The cubic root of 1525420 is about 115.1144418414.

The spelling of 1525420 in words is "one million, five hundred twenty-five thousand, four hundred twenty".