1225387242465 has 16 divisors (see below), whose sum is σ = 1968248464128. Its totient is φ = 650996903936.

The previous prime is 1225387242421. The next prime is 1225387242473. The reversal of 1225387242465 is 5642427835221.

It is a cyclic number.

It is not a de Polignac number, because 1225387242465 - 2¹³ = 1225387234273 is a prime.

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, 158930937 + ... + 158938646.

It is an arithmetic number, because the mean of its divisors is an integer number (123015529008).

Almost surely, 2^{1225387242465} is an apocalyptic number.

1225387242465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225387242465 is a deficient number, since it is larger than the sum of its proper divisors (742861221663).

1225387242465 is a wasteful number, since it uses less digits than its factorization.

1225387242465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317869848.

The product of its digits is 6451200, while the sum is 51.

The spelling of 1225387242465 in words is "one trillion, two hundred twenty-five billion, three hundred eighty-seven million, two hundred forty-two thousand, four hundred sixty-five".