126840361 has 4 divisors (see below), whose sum is σ = 127839232. Its totient is φ = 125841492.

The previous prime is 126840359. The next prime is 126840367. The reversal of 126840361 is 163048621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163048621 = 307 ⋅531103.

It is a cyclic number.

It is not a de Polignac number, because 126840361 - 2¹ = 126840359 is a prime.

It is a super-2 number, since 2×126840361² = 32176954357220642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126840367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499245 + ... + 499498.

It is an arithmetic number, because the mean of its divisors is an integer number (31959808).

Almost surely, 2^126840361 is an apocalyptic number.

It is an amenable number.

126840361 is a deficient number, since it is larger than the sum of its proper divisors (998871).

126840361 is an equidigital number, since it uses as much as digits as its factorization.

126840361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998870.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 126840361 is about 11262.3426071133. The cubic root of 126840361 is about 502.4418697968.

Adding to 126840361 its reverse (163048621), we get a palindrome (289888982).

The spelling of 126840361 in words is "one hundred twenty-six million, eight hundred forty thousand, three hundred sixty-one".