126421331 has 2 divisors, whose sum is σ = 126421332. Its totient is φ = 126421330.

The previous prime is 126421313. The next prime is 126421357. The reversal of 126421331 is 133124621.

Together with previous prime (126421313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126421331 is a prime.

It is a super-2 number, since 2×126421331² = 31964705863623122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126421297 and 126421306.

It is not a weakly prime, because it can be changed into another prime (126421381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63210665 + 63210666.

It is an arithmetic number, because the mean of its divisors is an integer number (63210666).

Almost surely, 2^126421331 is an apocalyptic number.

126421331 is a deficient number, since it is larger than the sum of its proper divisors (1).

126421331 is an equidigital number, since it uses as much as digits as its factorization.

126421331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 126421331 is about 11243.7240716766. The cubic root of 126421331 is about 501.8879701646.

Adding to 126421331 its reverse (133124621), we get a palindrome (259545952).

The spelling of 126421331 in words is "one hundred twenty-six million, four hundred twenty-one thousand, three hundred thirty-one".