126191437 has 2 divisors, whose sum is σ = 126191438. Its totient is φ = 126191436.

The previous prime is 126191327. The next prime is 126191447. The reversal of 126191437 is 734191621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124077321 + 2114116 = 11139^2 + 1454^2 .

It is a cyclic number.

It is not a de Polignac number, because 126191437 - 2⁷ = 126191309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126191447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63095718 + 63095719.

It is an arithmetic number, because the mean of its divisors is an integer number (63095719).

Almost surely, 2^126191437 is an apocalyptic number.

It is an amenable number.

126191437 is a deficient number, since it is larger than the sum of its proper divisors (1).

126191437 is an equidigital number, since it uses as much as digits as its factorization.

126191437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 126191437 is about 11233.4962055453. The cubic root of 126191437 is about 501.5835620345.

The spelling of 126191437 in words is "one hundred twenty-six million, one hundred ninety-one thousand, four hundred thirty-seven".