1243152445 has 16 divisors (see below), whose sum is σ = 1518750000. Its totient is φ = 976695808.

The previous prime is 1243152401. The next prime is 1243152457. The reversal of 1243152445 is 5442513421.

It can be written as a sum of positive squares in 8 ways, for example, as 172423161 + 1070729284 = 13131^2 + 32722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243152445 - 2¹¹ = 1243150397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56931 + ... + 75679.

It is an arithmetic number, because the mean of its divisors is an integer number (94921875).

Almost surely, 2^1243152445 is an apocalyptic number.

It is an amenable number.

1243152445 is a deficient number, since it is larger than the sum of its proper divisors (275597555).

1243152445 is a wasteful number, since it uses less digits than its factorization.

1243152445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18992.

The product of its digits is 19200, while the sum is 31.

The square root of 1243152445 is about 35258.3670211767. The cubic root of 1243152445 is about 1075.2467275759.

Adding to 1243152445 its reverse (5442513421), we get a palindrome (6685665866).

The spelling of 1243152445 in words is "one billion, two hundred forty-three million, one hundred fifty-two thousand, four hundred forty-five".