3457921 has 2 divisors, whose sum is σ = 3457922. Its totient is φ = 3457920.

The previous prime is 3457897. The next prime is 3457967. The reversal of 3457921 is 1297543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3370896 + 87025 = 1836^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 3457921 - 2¹¹ = 3455873 is a prime.

It is not a weakly prime, because it can be changed into another prime (3457991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1728960 + 1728961.

It is an arithmetic number, because the mean of its divisors is an integer number (1728961).

Almost surely, 2^3457921 is an apocalyptic number.

It is an amenable number.

3457921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3457921 is an equidigital number, since it uses as much as digits as its factorization.

3457921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 3457921 is about 1859.5486011395. The cubic root of 3457921 is about 151.2185336267.

The spelling of 3457921 in words is "three million, four hundred fifty-seven thousand, nine hundred twenty-one".