1212501 has 4 divisors (see below), whose sum is σ = 1616672. Its totient is φ = 808332.

The previous prime is 1212487. The next prime is 1212517. The reversal of 1212501 is 1052121.

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 not a de Polignac number, because 1212501 - 2⁶ = 1212437 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1212501 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202081 + ... + 202086.

It is an arithmetic number, because the mean of its divisors is an integer number (404168).

2^1212501 is an apocalyptic number.

It is an amenable number.

1212501 is a deficient number, since it is larger than the sum of its proper divisors (404171).

1212501 is an equidigital number, since it uses as much as digits as its factorization.

1212501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404170.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1212501 is about 1101.1362313538. The cubic root of 1212501 is about 106.6335910904.

Adding to 1212501 its reverse (1052121), we get a palindrome (2264622).

The spelling of 1212501 in words is "one million, two hundred twelve thousand, five hundred one".