126400749 has 8 divisors (see below), whose sum is σ = 177404640. Its totient is φ = 79832016.

The previous prime is 126400697. The next prime is 126400753. The reversal of 126400749 is 947004621.

It is a happy number.

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

It is not a de Polignac number, because 126400749 - 2¹⁵ = 126367981 is a prime.

It is a super-3 number, since 3×126400749³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126400759) 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, 1108722 + ... + 1108835.

It is an arithmetic number, because the mean of its divisors is an integer number (22175580).

Almost surely, 2^126400749 is an apocalyptic number.

126400749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

126400749 is a deficient number, since it is larger than the sum of its proper divisors (51003891).

126400749 is a wasteful number, since it uses less digits than its factorization.

126400749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217579.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 126400749 is about 11242.8087682749. The cubic root of 126400749 is about 501.8607320955.

The spelling of 126400749 in words is "one hundred twenty-six million, four hundred thousand, seven hundred forty-nine".