28421051 has 2 divisors, whose sum is σ = 28421052. Its totient is φ = 28421050.

The previous prime is 28421047. The next prime is 28421101. The reversal of 28421051 is 15012482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28421051 - 2² = 28421047 is a prime.

It is a super-2 number, since 2×28421051² = 1615512279889202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28421011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14210525 + 14210526.

It is an arithmetic number, because the mean of its divisors is an integer number (14210526).

Almost surely, 2^28421051 is an apocalyptic number.

28421051 is a deficient number, since it is larger than the sum of its proper divisors (1).

28421051 is an equidigital number, since it uses as much as digits as its factorization.

28421051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28421051 is about 5331.1397468084. The cubic root of 28421051 is about 305.1734246176.

The spelling of 28421051 in words is "twenty-eight million, four hundred twenty-one thousand, fifty-one".