1225212245 has 16 divisors (see below), whose sum is σ = 1548504000. Its totient is φ = 928061568.

The previous prime is 1225212239. The next prime is 1225212299. The reversal of 1225212245 is 5422125221.

It is a cyclic number.

It is not a de Polignac number, because 1225212245 - 2⁸ = 1225211989 is a prime.

It is a super-2 number, since 2×1225212245² = 3002290090595880050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302846 + ... + 306864.

It is an arithmetic number, because the mean of its divisors is an integer number (96781500).

Almost surely, 2^1225212245 is an apocalyptic number.

It is an amenable number.

1225212245 is a deficient number, since it is larger than the sum of its proper divisors (323291755).

1225212245 is a wasteful number, since it uses less digits than its factorization.

1225212245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7252.

The product of its digits is 3200, while the sum is 26.

The square root of 1225212245 is about 35003.0319401048. The cubic root of 1225212245 is about 1070.0492727768.

Adding to 1225212245 its reverse (5422125221), we get a palindrome (6647337466).

The spelling of 1225212245 in words is "one billion, two hundred twenty-five million, two hundred twelve thousand, two hundred forty-five".