126190691 has 8 divisors (see below), whose sum is σ = 137893104. Its totient is φ = 114526720.

The previous prime is 126190663. The next prime is 126190709. The reversal of 126190691 is 196091621.

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

It is not a de Polignac number, because 126190691 - 2¹⁸ = 125928547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126190601) 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, 2510 + ... + 16083.

It is an arithmetic number, because the mean of its divisors is an integer number (17236638).

Almost surely, 2^126190691 is an apocalyptic number.

126190691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126190691 is a deficient number, since it is larger than the sum of its proper divisors (11702413).

126190691 is a wasteful number, since it uses less digits than its factorization.

126190691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19221.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 126190691 is about 11233.4630012299. The cubic root of 126190691 is about 501.5825736365.

The spelling of 126190691 in words is "one hundred twenty-six million, one hundred ninety thousand, six hundred ninety-one".