1264623225 has 48 divisors (see below), whose sum is σ = 2118287040. Its totient is φ = 665683200.

The previous prime is 1264623221. The next prime is 1264623247. The reversal of 1264623225 is 5223264621.

It is a happy number.

It is not a de Polignac number, because 1264623225 - 2² = 1264623221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264623221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2484271 + ... + 2484779.

It is an arithmetic number, because the mean of its divisors is an integer number (44130980).

Almost surely, 2^1264623225 is an apocalyptic number.

1264623225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264623225 is a deficient number, since it is larger than the sum of its proper divisors (853663815).

1264623225 is a wasteful number, since it uses less digits than its factorization.

1264623225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 885 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 1264623225 is about 35561.5413754803. The cubic root of 1264623225 is about 1081.4017079167.

Adding to 1264623225 its reverse (5223264621), we get a palindrome (6487887846).

The spelling of 1264623225 in words is "one billion, two hundred sixty-four million, six hundred twenty-three thousand, two hundred twenty-five".