1251123610 has 32 divisors (see below), whose sum is σ = 2516681664. Its totient is φ = 443856000.

The previous prime is 1251123541. The next prime is 1251123613. The reversal of 1251123610 is 163211521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1251123613) by changing a digit.

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, 134196 + ... + 143215.

It is an arithmetic number, because the mean of its divisors is an integer number (78646302).

Almost surely, 2^1251123610 is an apocalyptic number.

1251123610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251123610 is an abundant number, since it is smaller than the sum of its proper divisors (1265558054).

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

1251123610 is a wasteful number, since it uses less digits than its factorization.

1251123610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277470.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1251123610 is about 35371.2257350519. The cubic root of 1251123610 is about 1077.5400142690.

The spelling of 1251123610 in words is "one billion, two hundred fifty-one million, one hundred twenty-three thousand, six hundred ten".