1286542725 has 96 divisors (see below), whose sum is σ = 2477758080. Its totient is φ = 583511040.

The previous prime is 1286542709. The next prime is 1286542727. The reversal of 1286542725 is 5272456821.

It is not a de Polignac number, because 1286542725 - 2⁴ = 1286542709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286542727) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 684487 + ... + 686363.

It is an arithmetic number, because the mean of its divisors is an integer number (25809980).

Almost surely, 2^1286542725 is an apocalyptic number.

1286542725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1286542725 is a deficient number, since it is larger than the sum of its proper divisors (1191215355).

1286542725 is a wasteful number, since it uses less digits than its factorization.

1286542725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959 (or 1954 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 1286542725 is about 35868.4084536797. The cubic root of 1286542725 is about 1087.6138710199.

The spelling of 1286542725 in words is "one billion, two hundred eighty-six million, five hundred forty-two thousand, seven hundred twenty-five".