126077642 has 4 divisors (see below), whose sum is σ = 189116466. Its totient is φ = 63038820.

The previous prime is 126077639. The next prime is 126077647. The reversal of 126077642 is 246770621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246770621 = 2347 ⋅105143.

It can be written as a sum of positive squares in only one way, i.e., 110859841 + 15217801 = 10529^2 + 3901^2 .

It is not an unprimeable number, because it can be changed into a prime (126077647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31519409 + ... + 31519412.

Almost surely, 2^126077642 is an apocalyptic number.

126077642 is a deficient number, since it is larger than the sum of its proper divisors (63038824).

126077642 is an equidigital number, since it uses as much as digits as its factorization.

126077642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63038823.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 126077642 is about 11228.4300772637. The cubic root of 126077642 is about 501.4327465532.

The spelling of 126077642 in words is "one hundred twenty-six million, seventy-seven thousand, six hundred forty-two".