126155491 has 16 divisors (see below), whose sum is σ = 158446080. Its totient is φ = 97577280.

The previous prime is 126155479. The next prime is 126155501. The reversal of 126155491 is 194551621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126155491 - 2¹⁷ = 126024419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126155411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4570 + ... + 16528.

It is an arithmetic number, because the mean of its divisors is an integer number (9902880).

Almost surely, 2^126155491 is an apocalyptic number.

126155491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126155491 is a deficient number, since it is larger than the sum of its proper divisors (32290589).

126155491 is a wasteful number, since it uses less digits than its factorization.

126155491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12114.

The product of its digits is 10800, while the sum is 34.

The square root of 126155491 is about 11231.8961444629. The cubic root of 126155491 is about 501.5359316633.

The spelling of 126155491 in words is "one hundred twenty-six million, one hundred fifty-five thousand, four hundred ninety-one".