7541921 has 2 divisors, whose sum is σ = 7541922. Its totient is φ = 7541920.

The previous prime is 7541903. The next prime is 7541923. The reversal of 7541921 is 1291457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6964321 + 577600 = 2639^2 + 760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7541921 is a prime.

Together with 7541923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7541923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3770960 + 3770961.

It is an arithmetic number, because the mean of its divisors is an integer number (3770961).

Almost surely, 2^7541921 is an apocalyptic number.

It is an amenable number.

7541921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7541921 is an equidigital number, since it uses as much as digits as its factorization.

7541921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 7541921 is about 2746.2558147412. The cubic root of 7541921 is about 196.1074050368.

The spelling of 7541921 in words is "seven million, five hundred forty-one thousand, nine hundred twenty-one".