115200421 has 6 divisors (see below), whose sum is σ = 134008710. Its totient is φ = 98743176.

The previous prime is 115200409. The next prime is 115200427. The reversal of 115200421 is 124002511.

It can be written as a sum of positive squares in only one way, i.e., 89302500 + 25897921 = 9450^2 + 5089^2 .

It is not a de Polignac number, because 115200421 - 2¹⁷ = 115069349 is a prime.

It is a super-2 number, since 2×115200421² = 26542273997154482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115200395 and 115200404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115200427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1175466 + ... + 1175563.

It is an arithmetic number, because the mean of its divisors is an integer number (22334785).

Almost surely, 2^115200421 is an apocalyptic number.

It is an amenable number.

115200421 is a deficient number, since it is larger than the sum of its proper divisors (18808289).

115200421 is an equidigital number, since it uses as much as digits as its factorization.

115200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351043 (or 2351036 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 115200421 is about 10733.1459041606. The cubic root of 115200421 is about 486.5767523783.

Adding to 115200421 its reverse (124002511), we get a palindrome (239202932).

The spelling of 115200421 in words is "one hundred fifteen million, two hundred thousand, four hundred twenty-one".