1242612256 has 48 divisors (see below), whose sum is σ = 2536476768. Its totient is φ = 598796800.

The previous prime is 1242612253. The next prime is 1242612257. The reversal of 1242612256 is 6522162421.

It is a super-2 number, since 2×1242612256² = 3088170437522819072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242612253) 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, 103191 + ... + 114601.

It is an arithmetic number, because the mean of its divisors is an integer number (52843266).

Almost surely, 2^1242612256 is an apocalyptic number.

1242612256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242612256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268238384).

1242612256 is an abundant number, since it is smaller than the sum of its proper divisors (1293864512).

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

1242612256 is a wasteful number, since it uses less digits than its factorization.

1242612256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545 (or 11537 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 1242612256 is about 35250.7057518002. The cubic root of 1242612256 is about 1075.0909621245.

Adding to 1242612256 its reverse (6522162421), we get a palindrome (7764774677).

The spelling of 1242612256 in words is "one billion, two hundred forty-two million, six hundred twelve thousand, two hundred fifty-six".