126401646 has 16 divisors (see below), whose sum is σ = 288918144. Its totient is φ = 36114744.

The previous prime is 126401641. The next prime is 126401651. The reversal of 126401646 is 646104621.

It is an interprime number because it is at equal distance from previous prime (126401641) and next prime (126401651).

It is a super-2 number, since 2×126401646² = 31954752223018632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126401641) 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, 1504740 + ... + 1504823.

It is an arithmetic number, because the mean of its divisors is an integer number (18057384).

Almost surely, 2^126401646 is an apocalyptic number.

126401646 is an abundant number, since it is smaller than the sum of its proper divisors (162516498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126401646 is a wasteful number, since it uses less digits than its factorization.

126401646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009575.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 126401646 is about 11242.8486603707. The cubic root of 126401646 is about 501.8619192404.

The spelling of 126401646 in words is "one hundred twenty-six million, four hundred one thousand, six hundred forty-six".