1251560260 has 48 divisors (see below), whose sum is σ = 2698157952. Its totient is φ = 487366400.

The previous prime is 1251560257. The next prime is 1251560273. The reversal of 1251560260 is 620651521.

It is a super-2 number, since 2×1251560260² = 3132806168822535200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460305 + ... + 463015.

It is an arithmetic number, because the mean of its divisors is an integer number (56211624).

Almost surely, 2^1251560260 is an apocalyptic number.

1251560260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251560260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349078976).

1251560260 is an abundant number, since it is smaller than the sum of its proper divisors (1446597692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251560260 is a wasteful number, since it uses less digits than its factorization.

1251560260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324 (or 3322 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1251560260 is about 35377.3975865947. The cubic root of 1251560260 is about 1077.6653557667.

The spelling of 1251560260 in words is "one billion, two hundred fifty-one million, five hundred sixty thousand, two hundred sixty".