126401515 has 8 divisors (see below), whose sum is σ = 151760448. Its totient is φ = 101068800.

The previous prime is 126401503. The next prime is 126401519. The reversal of 126401515 is 515104621.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-126401515 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126401515.

It is not an unprimeable number, because it can be changed into a prime (126401519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6379 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (18970056).

Almost surely, 2^126401515 is an apocalyptic number.

126401515 is a deficient number, since it is larger than the sum of its proper divisors (25358933).

126401515 is a wasteful number, since it uses less digits than its factorization.

126401515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13109.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 126401515 is about 11242.8428344436. The cubic root of 126401515 is about 501.8617458673.

The spelling of 126401515 in words is "one hundred twenty-six million, four hundred one thousand, five hundred fifteen".