1285374651 has 32 divisors (see below), whose sum is σ = 1891815936. Its totient is φ = 776239200.

The previous prime is 1285374637. The next prime is 1285374683. The reversal of 1285374651 is 1564735821.

It is a happy number.

1285374651 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1285374651 - 2⁷ = 1285374523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285374691) 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, 1944261 + ... + 1944921.

It is an arithmetic number, because the mean of its divisors is an integer number (59119248).

Almost surely, 2^1285374651 is an apocalyptic number.

1285374651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1285374651 is a deficient number, since it is larger than the sum of its proper divisors (606441285).

1285374651 is an equidigital number, since it uses as much as digits as its factorization.

1285374651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1162 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 1285374651 is about 35852.1219874082. The cubic root of 1285374651 is about 1087.2846169835.

The spelling of 1285374651 in words is "one billion, two hundred eighty-five million, three hundred seventy-four thousand, six hundred fifty-one".