4020454 has 4 divisors (see below), whose sum is σ = 6030684. Its totient is φ = 2010226.

The previous prime is 4020433. The next prime is 4020461. The reversal of 4020454 is 4540204.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×4020454² = 32328100732232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1005112 + ... + 1005115.

It is an arithmetic number, because the mean of its divisors is an integer number (1507671).

Almost surely, 2^4020454 is an apocalyptic number.

4020454 is a deficient number, since it is larger than the sum of its proper divisors (2010230).

4020454 is a wasteful number, since it uses less digits than its factorization.

4020454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010229.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 4020454 is about 2005.1069796896. The cubic root of 4020454 is about 159.0102178210.

Adding to 4020454 its reverse (4540204), we get a palindrome (8560658).

The spelling of 4020454 in words is "four million, twenty thousand, four hundred fifty-four".