126778157 has 8 divisors (see below), whose sum is σ = 138581280. Its totient is φ = 115021360.

The previous prime is 126778133. The next prime is 126778159. The reversal of 126778157 is 751877621.

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

It is a cyclic number.

It is not a de Polignac number, because 126778157 - 2⁸ = 126777901 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 (126778159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5723 + ... + 16920.

It is an arithmetic number, because the mean of its divisors is an integer number (17322660).

Almost surely, 2^126778157 is an apocalyptic number.

It is an amenable number.

126778157 is a deficient number, since it is larger than the sum of its proper divisors (11803123).

126778157 is a wasteful number, since it uses less digits than its factorization.

126778157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23163.

The product of its digits is 164640, while the sum is 44.

The square root of 126778157 is about 11259.5806760287. The cubic root of 126778157 is about 502.3597219056.

The spelling of 126778157 in words is "one hundred twenty-six million, seven hundred seventy-eight thousand, one hundred fifty-seven".