1530421 has 4 divisors (see below), whose sum is σ = 1544832. Its totient is φ = 1516012.

The previous prime is 1530409. The next prime is 1530457. The reversal of 1530421 is 1240351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1530421 - 2⁷ = 1530293 is a prime.

It is a Duffinian number.

1530421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1530395 and 1530404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7045 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (386208).

2^1530421 is an apocalyptic number.

It is an amenable number.

1530421 is a deficient number, since it is larger than the sum of its proper divisors (14411).

1530421 is a wasteful number, since it uses less digits than its factorization.

1530421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14410.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1530421 is about 1237.1018551437. The cubic root of 1530421 is about 115.2401032654.

Adding to 1530421 its reverse (1240351), we get a palindrome (2770772).

The spelling of 1530421 in words is "one million, five hundred thirty thousand, four hundred twenty-one".