1245450656240 has 80 divisors (see below), whose sum is σ = 3309659120640. Its totient is φ = 426970517760.

The previous prime is 1245450656173. The next prime is 1245450656249. The reversal of 1245450656240 is 426560545421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1245450656240² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1245450656191 and 1245450656200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245450656249) 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, 6024185 + ... + 6227495.

It is an arithmetic number, because the mean of its divisors is an integer number (41370739008).

Almost surely, 2^{1245450656240} is an apocalyptic number.

1245450656240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245450656240 is an abundant number, since it is smaller than the sum of its proper divisors (2064208464400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245450656240 is a wasteful number, since it uses less digits than its factorization.

1245450656240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214270 (or 214264 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 1245450656240 in words is "one trillion, two hundred forty-five billion, four hundred fifty million, six hundred fifty-six thousand, two hundred forty".