1225664601 has 16 divisors (see below), whose sum is σ = 1868350848. Its totient is φ = 700128000.

The previous prime is 1225664599. The next prime is 1225664653. The reversal of 1225664601 is 1064665221.

It is not a de Polignac number, because 1225664601 - 2¹ = 1225664599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225664101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60481 + ... + 78161.

It is an arithmetic number, because the mean of its divisors is an integer number (116771928).

Almost surely, 2^1225664601 is an apocalyptic number.

It is an amenable number.

1225664601 is a deficient number, since it is larger than the sum of its proper divisors (642686247).

1225664601 is a wasteful number, since it uses less digits than its factorization.

1225664601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20992.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1225664601 is about 35009.4930126102. The cubic root of 1225664601 is about 1070.1809461944.

The spelling of 1225664601 in words is "one billion, two hundred twenty-five million, six hundred sixty-four thousand, six hundred one".