1225210643 has 8 divisors (see below), whose sum is σ = 1238549136. Its totient is φ = 1211932800.

The previous prime is 1225210627. The next prime is 1225210673. The reversal of 1225210643 is 3460125221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1225210643 - 2⁴ = 1225210627 is a prime.

It is a super-2 number, since 2×1225210643² = 3002282239440946898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225210603) 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, 26063 + ... + 55943.

It is an arithmetic number, because the mean of its divisors is an integer number (154818642).

Almost surely, 2^1225210643 is an apocalyptic number.

1225210643 is a deficient number, since it is larger than the sum of its proper divisors (13338493).

1225210643 is a wasteful number, since it uses less digits than its factorization.

1225210643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30325.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1225210643 is about 35003.0090563654. The cubic root of 1225210643 is about 1070.0488064033.

Adding to 1225210643 its reverse (3460125221), we get a palindrome (4685335864).

The spelling of 1225210643 in words is "one billion, two hundred twenty-five million, two hundred ten thousand, six hundred forty-three".