1285052251 has 32 divisors (see below), whose sum is σ = 1622016000. Its totient is φ = 992645280.

The previous prime is 1285052183. The next prime is 1285052261. The reversal of 1285052251 is 1522505821.

It is a cyclic number.

It is not a de Polignac number, because 1285052251 - 2¹¹ = 1285050203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285052261) 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, 607686 + ... + 609796.

It is an arithmetic number, because the mean of its divisors is an integer number (50688000).

Almost surely, 2^1285052251 is an apocalyptic number.

1285052251 is a deficient number, since it is larger than the sum of its proper divisors (336963749).

1285052251 is a wasteful number, since it uses less digits than its factorization.

1285052251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 1285052251 is about 35847.6254583201. The cubic root of 1285052251 is about 1087.1937044826.

The spelling of 1285052251 in words is "one billion, two hundred eighty-five million, fifty-two thousand, two hundred fifty-one".