1245764347 has 4 divisors (see below), whose sum is σ = 1260773640. Its totient is φ = 1230755056.

The previous prime is 1245764327. The next prime is 1245764363. The reversal of 1245764347 is 7434675421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1245764347 - 2¹¹ = 1245762299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245764327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7504522 + ... + 7504687.

It is an arithmetic number, because the mean of its divisors is an integer number (315193410).

Almost surely, 2^1245764347 is an apocalyptic number.

1245764347 is a deficient number, since it is larger than the sum of its proper divisors (15009293).

1245764347 is an equidigital number, since it uses as much as digits as its factorization.

1245764347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15009292.

The product of its digits is 564480, while the sum is 43.

The square root of 1245764347 is about 35295.3870498681. The cubic root of 1245764347 is about 1075.9992430885. Note that the first 3 decimals are identical.

The spelling of 1245764347 in words is "one billion, two hundred forty-five million, seven hundred sixty-four thousand, three hundred forty-seven".