1251141040 has 20 divisors (see below), whose sum is σ = 2908903104. Its totient is φ = 500456384.

The previous prime is 1251141011. The next prime is 1251141043. The reversal of 1251141040 is 401411521.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1251140999 and 1251141017.

It is not an unprimeable number, because it can be changed into a prime (1251141043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7819552 + ... + 7819711.

Almost surely, 2^1251141040 is an apocalyptic number.

1251141040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251141040 is an abundant number, since it is smaller than the sum of its proper divisors (1657762064).

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

1251141040 is a wasteful number, since it uses less digits than its factorization.

1251141040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15639276 (or 15639270 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1251141040 is about 35371.4721209056. The cubic root of 1251141040 is about 1077.5450181538.

Adding to 1251141040 its reverse (401411521), we get a palindrome (1652552561).

The spelling of 1251141040 in words is "one billion, two hundred fifty-one million, one hundred forty-one thousand, forty".