1245456378 has 16 divisors (see below), whose sum is σ = 2767680960. Its totient is φ = 415152108.

The previous prime is 1245456323. The next prime is 1245456379. The reversal of 1245456378 is 8736545421.

1245456378 is a `hidden beast` number, since 1 + 2 + 4 + 5 + 4 + 5 + 637 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1245456379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11531950 + ... + 11532057.

It is an arithmetic number, because the mean of its divisors is an integer number (172980060).

Almost surely, 2^1245456378 is an apocalyptic number.

1245456378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1245456378 is an abundant number, since it is smaller than the sum of its proper divisors (1522224582).

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

1245456378 is a wasteful number, since it uses less digits than its factorization.

1245456378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23064018 (or 23064012 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 1245456378 is about 35291.0240429489. The cubic root of 1245456378 is about 1075.9105688214.

The spelling of 1245456378 in words is "one billion, two hundred forty-five million, four hundred fifty-six thousand, three hundred seventy-eight".