1234534645 has 8 divisors (see below), whose sum is σ = 1568585304. Its totient is φ = 929531904.

The previous prime is 1234534643. The next prime is 1234534661. The reversal of 1234534645 is 5464354321.

It can be written as a sum of positive squares in 4 ways, for example, as 316626436 + 917908209 = 17794^2 + 30297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1234534645 - 2¹ = 1234534643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234534643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7261884 + ... + 7262053.

It is an arithmetic number, because the mean of its divisors is an integer number (196073163).

Almost surely, 2^1234534645 is an apocalyptic number.

It is an amenable number.

1234534645 is a deficient number, since it is larger than the sum of its proper divisors (334050659).

1234534645 is a wasteful number, since it uses less digits than its factorization.

1234534645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14523959.

The product of its digits is 172800, while the sum is 37.

The square root of 1234534645 is about 35135.9451986139. The cubic root of 1234534645 is about 1072.7563502462.

Adding to 1234534645 its reverse (5464354321), we get a palindrome (6698888966).

The spelling of 1234534645 in words is "one billion, two hundred thirty-four million, five hundred thirty-four thousand, six hundred forty-five".