1245553878 has 32 divisors (see below), whose sum is σ = 2512360800. Its totient is φ = 411653120.

The previous prime is 1245553877. The next prime is 1245553921. The reversal of 1245553878 is 8783555421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245553877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733126 + ... + 734822.

It is an arithmetic number, because the mean of its divisors is an integer number (78511275).

Almost surely, 2^1245553878 is an apocalyptic number.

1245553878 is an abundant number, since it is smaller than the sum of its proper divisors (1266806922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245553878 is a wasteful number, since it uses less digits than its factorization.

1245553878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672.

The product of its digits is 1344000, while the sum is 48.

The square root of 1245553878 is about 35292.4053869951. The cubic root of 1245553878 is about 1075.9386438160.

The spelling of 1245553878 in words is "one billion, two hundred forty-five million, five hundred fifty-three thousand, eight hundred seventy-eight".