245531401 has 2 divisors, whose sum is σ = 245531402. Its totient is φ = 245531400.

The previous prime is 245531393. The next prime is 245531413. The reversal of 245531401 is 104135542.

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., 244953801 + 577600 = 15651^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 245531401 - 2³ = 245531393 is a prime.

It is not a weakly prime, because it can be changed into another prime (245532401) 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, 122765700 + 122765701.

It is an arithmetic number, because the mean of its divisors is an integer number (122765701).

Almost surely, 2^245531401 is an apocalyptic number.

It is an amenable number.

245531401 is a deficient number, since it is larger than the sum of its proper divisors (1).

245531401 is an equidigital number, since it uses as much as digits as its factorization.

245531401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 245531401 is about 15669.4416301284. The cubic root of 245531401 is about 626.1845490513.

Adding to 245531401 its reverse (104135542), we get a palindrome (349666943).

It can be divided in two parts, 2455 and 31401, that added together give a square (33856 = 184²).

The spelling of 245531401 in words is "two hundred forty-five million, five hundred thirty-one thousand, four hundred one".