4002021451 has 2 divisors, whose sum is σ = 4002021452. Its totient is φ = 4002021450.

The previous prime is 4002021409. The next prime is 4002021469. The reversal of 4002021451 is 1541202004.

4002021451 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4002021451 - 2¹⁷ = 4001890379 is a prime.

It is not a weakly prime, because it can be changed into another prime (4002021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001010725 + 2001010726.

It is an arithmetic number, because the mean of its divisors is an integer number (2001010726).

Almost surely, 2^4002021451 is an apocalyptic number.

4002021451 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002021451 is an equidigital number, since it uses as much as digits as its factorization.

4002021451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 4002021451 is about 63261.5321581765. The cubic root of 4002021451 is about 1587.6684113891.

Adding to 4002021451 its reverse (1541202004), we get a palindrome (5543223455).

The spelling of 4002021451 in words is "four billion, two million, twenty-one thousand, four hundred fifty-one".