1245130405 has 8 divisors (see below), whose sum is σ = 1582048152. Its totient is φ = 937509888.

The previous prime is 1245130387. The next prime is 1245130421. The reversal of 1245130405 is 5040315421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 142491969 + 1102638436 = 11937^2 + 33206^2 .

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 1245130405 - 2¹⁹ = 1244606117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245130405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7324212 + ... + 7324381.

It is an arithmetic number, because the mean of its divisors is an integer number (197756019).

Almost surely, 2^1245130405 is an apocalyptic number.

It is an amenable number.

1245130405 is a deficient number, since it is larger than the sum of its proper divisors (336917747).

1245130405 is a wasteful number, since it uses less digits than its factorization.

1245130405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14648615.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1245130405 is about 35286.4053850771. The cubic root of 1245130405 is about 1075.8166946924.

Adding to 1245130405 its reverse (5040315421), we get a palindrome (6285445826).

The spelling of 1245130405 in words is "one billion, two hundred forty-five million, one hundred thirty thousand, four hundred five".