4292921 has 2 divisors, whose sum is σ = 4292922. Its totient is φ = 4292920.

The previous prime is 4292903. The next prime is 4292923. The reversal of 4292921 is 1292924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 212521 = 2020^2 + 461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4292921 is a prime.

Together with 4292923, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4292923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2146460 + 2146461.

It is an arithmetic number, because the mean of its divisors is an integer number (2146461).

Almost surely, 2^4292921 is an apocalyptic number.

It is an amenable number.

4292921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4292921 is an equidigital number, since it uses as much as digits as its factorization.

4292921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 4292921 is about 2071.9365337770. The cubic root of 4292921 is about 162.5240485119.

The spelling of 4292921 in words is "four million, two hundred ninety-two thousand, nine hundred twenty-one".