7642121 has 2 divisors, whose sum is σ = 7642122. Its totient is φ = 7642120.

The previous prime is 7642111. The next prime is 7642127. The reversal of 7642121 is 1212467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 698896 = 2635^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 7642121 - 2²² = 3447817 is a prime.

It is not a weakly prime, because it can be changed into another prime (7642127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821060 + 3821061.

It is an arithmetic number, because the mean of its divisors is an integer number (3821061).

Almost surely, 2^7642121 is an apocalyptic number.

It is an amenable number.

7642121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7642121 is an equidigital number, since it uses as much as digits as its factorization.

7642121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 7642121 is about 2764.4386410264. The cubic root of 7642121 is about 196.9720643734.

Adding to 7642121 its reverse (1212467), we get a palindrome (8854588).

The spelling of 7642121 in words is "seven million, six hundred forty-two thousand, one hundred twenty-one".