126290681 has 8 divisors (see below), whose sum is σ = 138824928. Its totient is φ = 113932000.

The previous prime is 126290651. The next prime is 126290693. The reversal of 126290681 is 186092621.

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 126290681 - 2²⁶ = 59181817 is a prime.

It is a super-2 number, since 2×126290681² = 31898672214887522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126290641) 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, 42380 + ... + 45261.

It is an arithmetic number, because the mean of its divisors is an integer number (17353116).

Almost surely, 2^126290681 is an apocalyptic number.

126290681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126290681 is a deficient number, since it is larger than the sum of its proper divisors (12534247).

126290681 is a wasteful number, since it uses less digits than its factorization.

126290681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87783.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 126290681 is about 11237.9126620561. The cubic root of 126290681 is about 501.7150186959.

The spelling of 126290681 in words is "one hundred twenty-six million, two hundred ninety thousand, six hundred eighty-one".