126402789 has 8 divisors (see below), whose sum is σ = 168589792. Its totient is φ = 84242160.

The previous prime is 126402761. The next prime is 126402821. The reversal of 126402789 is 987204621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126402789 - 2²¹ = 124305637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126202789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12459 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (21073724).

Almost surely, 2^126402789 is an apocalyptic number.

It is an amenable number.

126402789 is a deficient number, since it is larger than the sum of its proper divisors (42187003).

126402789 is an equidigital number, since it uses as much as digits as its factorization.

126402789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13187.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 126402789 is about 11242.8994925686. The cubic root of 126402789 is about 501.8634319487.

The spelling of 126402789 in words is "one hundred twenty-six million, four hundred two thousand, seven hundred eighty-nine".