1225001543 has 8 divisors (see below), whose sum is σ = 1234920960. Its totient is φ = 1215106200.

The previous prime is 1225001527. The next prime is 1225001621. The reversal of 1225001543 is 3451005221.

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 1225001543 - 2⁴ = 1225001527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225001443) 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, 104198 + ... + 115356.

It is an arithmetic number, because the mean of its divisors is an integer number (154365120).

Almost surely, 2^1225001543 is an apocalyptic number.

1225001543 is a deficient number, since it is larger than the sum of its proper divisors (9919417).

1225001543 is a wasteful number, since it uses less digits than its factorization.

1225001543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12037.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1225001543 is about 35000.0220428502. The cubic root of 1225001543 is about 1069.9879298141.

Adding to 1225001543 its reverse (3451005221), we get a palindrome (4676006764).

The spelling of 1225001543 in words is "one billion, two hundred twenty-five million, one thousand, five hundred forty-three".