245421131 has 2 divisors, whose sum is σ = 245421132. Its totient is φ = 245421130.

The previous prime is 245421107. The next prime is 245421181. The reversal of 245421131 is 131124542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245421131 - 2¹⁸ = 245158987 is a prime.

It is a super-2 number, since 2×245421131² = 120463063082638322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 245421097 and 245421106.

It is not a weakly prime, because it can be changed into another prime (245421101) by changing a digit.

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, 122710565 + 122710566.

It is an arithmetic number, because the mean of its divisors is an integer number (122710566).

Almost surely, 2^245421131 is an apocalyptic number.

245421131 is a deficient number, since it is larger than the sum of its proper divisors (1).

245421131 is an equidigital number, since it uses as much as digits as its factorization.

245421131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 23.

The square root of 245421131 is about 15665.9226028983. The cubic root of 245421131 is about 626.0907936167.

Adding to 245421131 its reverse (131124542), we get a palindrome (376545673).

The spelling of 245421131 in words is "two hundred forty-five million, four hundred twenty-one thousand, one hundred thirty-one".