1245545440 has 24 divisors (see below), whose sum is σ = 2942601480. Its totient is φ = 498218112.

The previous prime is 1245545423. The next prime is 1245545453. The reversal of 1245545440 is 445455421.

It is a junction number, because it is equal to n+sod(n) for n = 1245545396 and 1245545405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3892170 + ... + 3892489.

It is an arithmetic number, because the mean of its divisors is an integer number (122608395).

Almost surely, 2^1245545440 is an apocalyptic number.

1245545440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245545440 is an abundant number, since it is smaller than the sum of its proper divisors (1697056040).

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

1245545440 is an equidigital number, since it uses as much as digits as its factorization.

1245545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7784674 (or 7784666 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 34.

The square root of 1245545440 is about 35292.2858426597. The cubic root of 1245545440 is about 1075.9362141631.

The spelling of 1245545440 in words is "one billion, two hundred forty-five million, five hundred forty-five thousand, four hundred forty".