1259972440 has 16 divisors (see below), whose sum is σ = 2834938080. Its totient is φ = 503988960.

The previous prime is 1259972437. The next prime is 1259972447. The reversal of 1259972440 is 442799521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1259972447) 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, 15749616 + ... + 15749695.

It is an arithmetic number, because the mean of its divisors is an integer number (177183630).

Almost surely, 2^1259972440 is an apocalyptic number.

1259972440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1259972440 is an abundant number, since it is smaller than the sum of its proper divisors (1574965640).

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

1259972440 is a wasteful number, since it uses less digits than its factorization.

1259972440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31499322 (or 31499318 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1259972440 is about 35496.0904889539. The cubic root of 1259972440 is about 1080.0744233121.

The spelling of 1259972440 in words is "one billion, two hundred fifty-nine million, nine hundred seventy-two thousand, four hundred forty".