126921607 has 2 divisors, whose sum is σ = 126921608. Its totient is φ = 126921606.

The previous prime is 126921593. The next prime is 126921629. The reversal of 126921607 is 706129621.

It is a weak prime.

It is an emirp because it is prime and its reverse (706129621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126921607 is a prime.

It is a super-2 number, since 2×126921607² = 32218188646924898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126921407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63460803 + 63460804.

It is an arithmetic number, because the mean of its divisors is an integer number (63460804).

Almost surely, 2^126921607 is an apocalyptic number.

126921607 is a deficient number, since it is larger than the sum of its proper divisors (1).

126921607 is an equidigital number, since it uses as much as digits as its factorization.

126921607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 126921607 is about 11265.9490057429. The cubic root of 126921607 is about 502.5491245094.

The spelling of 126921607 in words is "one hundred twenty-six million, nine hundred twenty-one thousand, six hundred seven".