126251403 has 4 divisors (see below), whose sum is σ = 168335208. Its totient is φ = 84167600.

The previous prime is 126251387. The next prime is 126251407. The reversal of 126251403 is 304152621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126251403 - 2⁴ = 126251387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126251407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21041898 + ... + 21041903.

It is an arithmetic number, because the mean of its divisors is an integer number (42083802).

Almost surely, 2^126251403 is an apocalyptic number.

126251403 is a deficient number, since it is larger than the sum of its proper divisors (42083805).

126251403 is an equidigital number, since it uses as much as digits as its factorization.

126251403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42083804.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 126251403 is about 11236.1649596292. The cubic root of 126251403 is about 501.6630000627.

It can be divided in two parts, 12625 and 1403, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 126251403 in words is "one hundred twenty-six million, two hundred fifty-one thousand, four hundred three".