112820401 has 2 divisors, whose sum is σ = 112820402. Its totient is φ = 112820400.

The previous prime is 112820399. The next prime is 112820413. The reversal of 112820401 is 104028211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76580001 + 36240400 = 8751^2 + 6020^2 .

It is a cyclic number.

It is not a de Polignac number, because 112820401 - 2¹ = 112820399 is a prime.

Together with 112820399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (112820431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56410200 + 56410201.

It is an arithmetic number, because the mean of its divisors is an integer number (56410201).

Almost surely, 2^112820401 is an apocalyptic number.

It is an amenable number.

112820401 is a deficient number, since it is larger than the sum of its proper divisors (1).

112820401 is an equidigital number, since it uses as much as digits as its factorization.

112820401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 112820401 is about 10621.6948270980. The cubic root of 112820401 is about 483.2025449796.

Adding to 112820401 its reverse (104028211), we get a palindrome (216848612).

The spelling of 112820401 in words is "one hundred twelve million, eight hundred twenty thousand, four hundred one".