1421501 has 2 divisors, whose sum is σ = 1421502. Its totient is φ = 1421500.

The previous prime is 1421479. The next prime is 1421521. The reversal of 1421501 is 1051241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 329476 = 1045^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421501 - 2⁶ = 1421437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710750 + 710751.

It is an arithmetic number, because the mean of its divisors is an integer number (710751).

2^1421501 is an apocalyptic number.

It is an amenable number.

1421501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421501 is an equidigital number, since it uses as much as digits as its factorization.

1421501 is an evil number, because the sum of its binary digits is even.

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

The square root of 1421501 is about 1192.2671680458. The cubic root of 1421501 is about 112.4386760433.

Adding to 1421501 its reverse (1051241), we get a palindrome (2472742).

The spelling of 1421501 in words is "one million, four hundred twenty-one thousand, five hundred one".