126715642 has 8 divisors (see below), whose sum is σ = 191284596. Its totient is φ = 62954112.

The previous prime is 126715621. The next prime is 126715643. The reversal of 126715642 is 246517621.

It can be written as a sum of positive squares in 2 ways, for example, as 110061081 + 16654561 = 10491^2 + 4081^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 126715598 and 126715607.

It is not an unprimeable number, because it can be changed into a prime (126715643) 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, 201463 + ... + 202090.

Almost surely, 2^126715642 is an apocalyptic number.

126715642 is a deficient number, since it is larger than the sum of its proper divisors (64568954).

126715642 is a wasteful number, since it uses less digits than its factorization.

126715642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403712.

The product of its digits is 20160, while the sum is 34.

The square root of 126715642 is about 11256.8042534282. The cubic root of 126715642 is about 502.2771362242.

The spelling of 126715642 in words is "one hundred twenty-six million, seven hundred fifteen thousand, six hundred forty-two".