1243226477 has 4 divisors (see below), whose sum is σ = 1273549116. Its totient is φ = 1212903840.

The previous prime is 1243226461. The next prime is 1243226519. The reversal of 1243226477 is 7746223421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 740166436 + 503060041 = 27206^2 + 22429^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243226477 - 2⁴ = 1243226461 is a prime.

It is a super-2 number, since 2×1243226477² = 3091224146227663058, which contains 22 as substring.

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 1243226477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243220477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15161258 + ... + 15161339.

It is an arithmetic number, because the mean of its divisors is an integer number (318387279).

Almost surely, 2^1243226477 is an apocalyptic number.

It is an amenable number.

1243226477 is a deficient number, since it is larger than the sum of its proper divisors (30322639).

1243226477 is an equidigital number, since it uses as much as digits as its factorization.

1243226477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30322638.

The product of its digits is 112896, while the sum is 38.

The square root of 1243226477 is about 35259.4168556430. The cubic root of 1243226477 is about 1075.2680714548.

Adding to 1243226477 its reverse (7746223421), we get a palindrome (8989449898).

The spelling of 1243226477 in words is "one billion, two hundred forty-three million, two hundred twenty-six thousand, four hundred seventy-seven".