1245403541551 has 32 divisors (see below), whose sum is σ = 1370628000000. Its totient is φ = 1124653932288.

The previous prime is 1245403541539. The next prime is 1245403541567. The reversal of 1245403541551 is 1551453045421.

It is a cyclic number.

It is not a de Polignac number, because 1245403541551 - 2¹⁹ = 1245403017263 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 (1245403541531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166072200 + ... + 166079698.

It is an arithmetic number, because the mean of its divisors is an integer number (42832125000).

Almost surely, 2^{1245403541551} is an apocalyptic number.

1245403541551 is a deficient number, since it is larger than the sum of its proper divisors (125224458449).

1245403541551 is a wasteful number, since it uses less digits than its factorization.

1245403541551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8983.

The product of its (nonzero) digits is 240000, while the sum is 40.

Adding to 1245403541551 its reverse (1551453045421), we get a palindrome (2796856586972).

The spelling of 1245403541551 in words is "one trillion, two hundred forty-five billion, four hundred three million, five hundred forty-one thousand, five hundred fifty-one".