56404001 has 2 divisors, whose sum is σ = 56404002. Its totient is φ = 56404000.

The previous prime is 56403983. The next prime is 56404009. The reversal of 56404001 is 10040465.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55115776 + 1288225 = 7424^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 56404001 - 2¹⁰ = 56402977 is a prime.

It is a super-2 number, since 2×56404001² = 6362822657616002, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3361007 and since 56404001 and 3361007 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56404009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28202000 + 28202001.

It is an arithmetic number, because the mean of its divisors is an integer number (28202001).

Almost surely, 2^56404001 is an apocalyptic number.

It is an amenable number.

56404001 is a deficient number, since it is larger than the sum of its proper divisors (1).

56404001 is an equidigital number, since it uses as much as digits as its factorization.

56404001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 56404001 is about 7510.2597158820. The cubic root of 56404001 is about 383.5040640026.

Adding to 56404001 its reverse (10040465), we get a palindrome (66444466).

The spelling of 56404001 in words is "fifty-six million, four hundred four thousand, one".