2921457 has 16 divisors (see below), whose sum is σ = 4856832. Its totient is φ = 1517520.

The previous prime is 2921423. The next prime is 2921507. The reversal of 2921457 is 7541292.

It is not a de Polignac number, because 2921457 - 2⁷ = 2921329 is a prime.

It is a super-2 number, since 2×2921457² = 17069822005698, which contains 22 as substring.

2921457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2921417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6093 + ... + 6554.

It is an arithmetic number, because the mean of its divisors is an integer number (303552).

2^2921457 is an apocalyptic number.

It is an amenable number.

2921457 is a deficient number, since it is larger than the sum of its proper divisors (1935375).

2921457 is a wasteful number, since it uses less digits than its factorization.

2921457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12668.

The product of its digits is 5040, while the sum is 30.

The square root of 2921457 is about 1709.2270182746. The cubic root of 2921457 is about 142.9551589726.

The spelling of 2921457 in words is "two million, nine hundred twenty-one thousand, four hundred fifty-seven".