126977761 has 8 divisors (see below), whose sum is σ = 128701440. Its totient is φ = 125264832.

The previous prime is 126977713. The next prime is 126977801. The reversal of 126977761 is 167779621.

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 126977761 - 2²⁵ = 93423329 is a prime.

It is a super-2 number, since 2×126977761² = 32246703577146242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126977701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22680 + ... + 27718.

It is an arithmetic number, because the mean of its divisors is an integer number (16087680).

Almost surely, 2^126977761 is an apocalyptic number.

It is an amenable number.

126977761 is a deficient number, since it is larger than the sum of its proper divisors (1723679).

126977761 is a wasteful number, since it uses less digits than its factorization.

126977761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375.

The product of its digits is 222264, while the sum is 46.

The square root of 126977761 is about 11268.4409303151. The cubic root of 126977761 is about 502.6232279485.

The spelling of 126977761 in words is "one hundred twenty-six million, nine hundred seventy-seven thousand, seven hundred sixty-one".