1506421 has 8 divisors (see below), whose sum is σ = 1823040. Its totient is φ = 1215168.

The previous prime is 1506413. The next prime is 1506433. The reversal of 1506421 is 1246051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1506421 - 2³ = 1506413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506121) 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, 6211 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (227880).

2^1506421 is an apocalyptic number.

It is an amenable number.

1506421 is a deficient number, since it is larger than the sum of its proper divisors (316619).

1506421 is a wasteful number, since it uses less digits than its factorization.

1506421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12683.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1506421 is about 1227.3634343584. The cubic root of 1506421 is about 114.6345297462.

The spelling of 1506421 in words is "one million, five hundred six thousand, four hundred twenty-one".