1245044551 has 2 divisors, whose sum is σ = 1245044552. Its totient is φ = 1245044550.

The previous prime is 1245044539. The next prime is 1245044557. The reversal of 1245044551 is 1554405421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245044551 - 2⁹ = 1245044039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245044557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622522275 + 622522276.

It is an arithmetic number, because the mean of its divisors is an integer number (622522276).

Almost surely, 2^1245044551 is an apocalyptic number.

1245044551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245044551 is an equidigital number, since it uses as much as digits as its factorization.

1245044551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 1245044551 is about 35285.1888332768. The cubic root of 1245044551 is about 1075.7919676199.

Adding to 1245044551 its reverse (1554405421), we get a palindrome (2799449972).

The spelling of 1245044551 in words is "one billion, two hundred forty-five million, forty-four thousand, five hundred fifty-one".