1520420 has 24 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 552800.

The previous prime is 1520417. The next prime is 1520423. The reversal of 1520420 is 240251.

It is an interprime number because it is at equal distance from previous prime (1520417) and next prime (1520423).

It is a junction number, because it is equal to n+sod(n) for n = 1520395 and 1520404.

It is not an unprimeable number, because it can be changed into a prime (1520423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3236 + ... + 3675.

It is an arithmetic number, because the mean of its divisors is an integer number (145152).

2^1520420 is an apocalyptic number.

1520420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520420 is an abundant number, since it is smaller than the sum of its proper divisors (1963228).

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

1520420 is a wasteful number, since it uses less digits than its factorization.

1520420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931 (or 6929 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1520420 is about 1233.0531213212. The cubic root of 1520420 is about 114.9885306772.

Adding to 1520420 its reverse (240251), we get a palindrome (1760671).

The spelling of 1520420 in words is "one million, five hundred twenty thousand, four hundred twenty".