1285573641 has 16 divisors (see below), whose sum is σ = 1896265728. Its totient is φ = 768160400.

The previous prime is 1285573607. The next prime is 1285573651. The reversal of 1285573641 is 1463755821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1285573641 - 2⁹ = 1285573129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285573593 and 1285573602.

It is not an unprimeable number, because it can be changed into a prime (1285573651) 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, 272001 + ... + 276686.

It is an arithmetic number, because the mean of its divisors is an integer number (118516608).

Almost surely, 2^1285573641 is an apocalyptic number.

1285573641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1285573641 is a deficient number, since it is larger than the sum of its proper divisors (610692087).

1285573641 is a wasteful number, since it uses less digits than its factorization.

1285573641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548772.

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

The square root of 1285573641 is about 35854.8970295551. The cubic root of 1285573641 is about 1087.3407219232.

The spelling of 1285573641 in words is "one billion, two hundred eighty-five million, five hundred seventy-three thousand, six hundred forty-one".