1225215705 has 32 divisors (see below), whose sum is σ = 2267403264. Its totient is φ = 553346496.

The previous prime is 1225215679. The next prime is 1225215713. The reversal of 1225215705 is 5075125221.

It is not a de Polignac number, because 1225215705 - 2⁹ = 1225215193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61579 + ... + 79008.

It is an arithmetic number, because the mean of its divisors is an integer number (70856352).

Almost surely, 2^1225215705 is an apocalyptic number.

1225215705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225215705 is a deficient number, since it is larger than the sum of its proper divisors (1042187559).

1225215705 is a wasteful number, since it uses less digits than its factorization.

1225215705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140685.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 1225215705 is about 35003.0813643599. The cubic root of 1225215705 is about 1070.0502800491.

The spelling of 1225215705 in words is "one billion, two hundred twenty-five million, two hundred fifteen thousand, seven hundred five".