123501431 has 2 divisors, whose sum is σ = 123501432. Its totient is φ = 123501430.

The previous prime is 123501409. The next prime is 123501457. The reversal of 123501431 is 134105321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123501431 - 2¹⁸ = 123239287 is a prime.

It is a super-2 number, since 2×123501431² = 30505206918095522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123501331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61750715 + 61750716.

It is an arithmetic number, because the mean of its divisors is an integer number (61750716).

Almost surely, 2^123501431 is an apocalyptic number.

123501431 is a deficient number, since it is larger than the sum of its proper divisors (1).

123501431 is an equidigital number, since it uses as much as digits as its factorization.

123501431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 123501431 is about 11113.1197689938. The cubic root of 123501431 is about 497.9938696471.

Adding to 123501431 its reverse (134105321), we get a palindrome (257606752).

The spelling of 123501431 in words is "one hundred twenty-three million, five hundred one thousand, four hundred thirty-one".