1285372874 has 8 divisors (see below), whose sum is σ = 1928460000. Its totient is φ = 642552876.

The previous prime is 1285372867. The next prime is 1285372877. The reversal of 1285372874 is 4782735821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1285372877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54284 + ... + 74279.

It is an arithmetic number, because the mean of its divisors is an integer number (241057500).

Almost surely, 2^1285372874 is an apocalyptic number.

1285372874 is a deficient number, since it is larger than the sum of its proper divisors (643087126).

1285372874 is a wasteful number, since it uses less digits than its factorization.

1285372874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133564.

The product of its digits is 752640, while the sum is 47.

The square root of 1285372874 is about 35852.0972050451. The cubic root of 1285372874 is about 1087.2841159348.

The spelling of 1285372874 in words is "one billion, two hundred eighty-five million, three hundred seventy-two thousand, eight hundred seventy-four".