1225212571 has 8 divisors (see below), whose sum is σ = 1336871088. Its totient is φ = 1113600000.

The previous prime is 1225212539. The next prime is 1225212623. The reversal of 1225212571 is 1752125221.

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 1225212571 - 2⁵ = 1225212539 is a prime.

It is a super-2 number, since 2×1225212571² = 3002291688272860082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225212871) 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 7 ways as a sum of consecutive naturals, for example, 68571 + ... + 84571.

It is an arithmetic number, because the mean of its divisors is an integer number (167108886).

Almost surely, 2^1225212571 is an apocalyptic number.

1225212571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1225212571 is a deficient number, since it is larger than the sum of its proper divisors (111658517).

1225212571 is a wasteful number, since it uses less digits than its factorization.

1225212571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22973.

The product of its digits is 2800, while the sum is 28.

The square root of 1225212571 is about 35003.0365968440. The cubic root of 1225212571 is about 1070.0493676818.

Adding to 1225212571 its reverse (1752125221), we get a palindrome (2977337792).

The spelling of 1225212571 in words is "one billion, two hundred twenty-five million, two hundred twelve thousand, five hundred seventy-one".