1243154056 has 32 divisors (see below), whose sum is σ = 2368684800. Its totient is φ = 611582400.

The previous prime is 1243154041. The next prime is 1243154069. The reversal of 1243154056 is 6504513421.

It is a happy number.

It is a super-2 number, since 2×1243154056² = 3090864013898502272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126985 + ... + 136423.

It is an arithmetic number, because the mean of its divisors is an integer number (74021400).

Almost surely, 2^1243154056 is an apocalyptic number.

It is an amenable number.

1243154056 is a deficient number, since it is larger than the sum of its proper divisors (1125530744).

1243154056 is a wasteful number, since it uses less digits than its factorization.

1243154056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709 (or 9705 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1243154056 is about 35258.3898668104. The cubic root of 1243154056 is about 1075.2471920461.

Adding to 1243154056 its reverse (6504513421), we get a palindrome (7747667477).

The spelling of 1243154056 in words is "one billion, two hundred forty-three million, one hundred fifty-four thousand, fifty-six".