126903421 has 2 divisors, whose sum is σ = 126903422. Its totient is φ = 126903420.

The previous prime is 126903401. The next prime is 126903433. The reversal of 126903421 is 124309621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124768900 + 2134521 = 11170^2 + 1461^2 .

It is an emirp because it is prime and its reverse (124309621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126903421 is a prime.

It is a super-2 number, since 2×126903421² = 32208956523006482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126903421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126903401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63451710 + 63451711.

It is an arithmetic number, because the mean of its divisors is an integer number (63451711).

Almost surely, 2^126903421 is an apocalyptic number.

It is an amenable number.

126903421 is a deficient number, since it is larger than the sum of its proper divisors (1).

126903421 is an equidigital number, since it uses as much as digits as its factorization.

126903421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 126903421 is about 11265.1418544109. The cubic root of 126903421 is about 502.5251207296.

The spelling of 126903421 in words is "one hundred twenty-six million, nine hundred three thousand, four hundred twenty-one".