1231350545 has 8 divisors (see below), whose sum is σ = 1564539624. Its totient is φ = 927134464.

The previous prime is 1231350541. The next prime is 1231350551. The reversal of 1231350545 is 5450531321.

It can be written as a sum of positive squares in 4 ways, for example, as 700555024 + 530795521 = 26468^2 + 23039^2 .

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 1231350545 - 2² = 1231350541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231350541) 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, 7243154 + ... + 7243323.

It is an arithmetic number, because the mean of its divisors is an integer number (195567453).

Almost surely, 2^1231350545 is an apocalyptic number.

It is an amenable number.

1231350545 is a deficient number, since it is larger than the sum of its proper divisors (333189079).

1231350545 is a wasteful number, since it uses less digits than its factorization.

1231350545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14486499.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1231350545 is about 35090.6047967259. The cubic root of 1231350545 is about 1071.8332752077.

Adding to 1231350545 its reverse (5450531321), we get a palindrome (6681881866).

The spelling of 1231350545 in words is "one billion, two hundred thirty-one million, three hundred fifty thousand, five hundred forty-five".