1501421 has 4 divisors (see below), whose sum is σ = 1504992. Its totient is φ = 1497852.

The previous prime is 1501411. The next prime is 1501427. The reversal of 1501421 is 1241051.

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 1501421 - 2¹⁰ = 1500397 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1501396 and 1501405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1501427) 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 3 ways as a sum of consecutive naturals, for example, 1055 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (376248).

2^1501421 is an apocalyptic number.

It is an amenable number.

1501421 is a deficient number, since it is larger than the sum of its proper divisors (3571).

1501421 is an equidigital number, since it uses as much as digits as its factorization.

1501421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1501421 is about 1225.3248548854. The cubic root of 1501421 is about 114.5075603787.

Adding to 1501421 its reverse (1241051), we get a palindrome (2742472).

The spelling of 1501421 in words is "one million, five hundred one thousand, four hundred twenty-one".