1226405537 has 8 divisors (see below), whose sum is σ = 1434202176. Its totient is φ = 1026757872.

The previous prime is 1226405513. The next prime is 1226405567. The reversal of 1226405537 is 7355046221.

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

It is not a de Polignac number, because 1226405537 - 2¹² = 1226401441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1226405497 and 1226405506.

It is not an unprimeable number, because it can be changed into a prime (1226405567) 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, 2036918 + ... + 2037519.

It is an arithmetic number, because the mean of its divisors is an integer number (179275272).

Almost surely, 2^1226405537 is an apocalyptic number.

It is an amenable number.

1226405537 is a deficient number, since it is larger than the sum of its proper divisors (207796639).

1226405537 is an equidigital number, since it uses as much as digits as its factorization.

1226405537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074487.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 1226405537 is about 35020.0733437267. The cubic root of 1226405537 is about 1070.3965505452.

The spelling of 1226405537 in words is "one billion, two hundred twenty-six million, four hundred five thousand, five hundred thirty-seven".