126949519 has 4 divisors (see below), whose sum is σ = 127443744. Its totient is φ = 126455296.

The previous prime is 126949513. The next prime is 126949531. The reversal of 126949519 is 915949621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 915949621 = 79 ⋅11594299.

It is a cyclic number.

It is not a de Polignac number, because 126949519 - 2¹³ = 126941327 is a prime.

It is a super-2 number, since 2×126949519² = 32232360748662722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126949513) 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 3 ways as a sum of consecutive naturals, for example, 246727 + ... + 247240.

It is an arithmetic number, because the mean of its divisors is an integer number (31860936).

Almost surely, 2^126949519 is an apocalyptic number.

126949519 is a deficient number, since it is larger than the sum of its proper divisors (494225).

126949519 is an equidigital number, since it uses as much as digits as its factorization.

126949519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494224.

The product of its digits is 174960, while the sum is 46.

The square root of 126949519 is about 11267.1877147760. The cubic root of 126949519 is about 502.5859612187.

The spelling of 126949519 in words is "one hundred twenty-six million, nine hundred forty-nine thousand, five hundred nineteen".