1245152551 has 4 divisors (see below), whose sum is σ = 1245344112. Its totient is φ = 1244960992.

The previous prime is 1245152549. The next prime is 1245152561. The reversal of 1245152551 is 1552515421.

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 1245152551 - 2¹ = 1245152549 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 (1245152561) 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, 85675 + ... + 99148.

It is an arithmetic number, because the mean of its divisors is an integer number (311336028).

Almost surely, 2^1245152551 is an apocalyptic number.

1245152551 is a deficient number, since it is larger than the sum of its proper divisors (191561).

1245152551 is an equidigital number, since it uses as much as digits as its factorization.

1245152551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191560.

The product of its digits is 10000, while the sum is 31.

The square root of 1245152551 is about 35286.7191872523. The cubic root of 1245152551 is about 1075.8230728450.

Adding to 1245152551 its reverse (1552515421), we get a palindrome (2797667972).

The spelling of 1245152551 in words is "one billion, two hundred forty-five million, one hundred fifty-two thousand, five hundred fifty-one".