1252261709 has 24 divisors (see below), whose sum is σ = 1375257600. Its totient is φ = 1138860000.

The previous prime is 1252261697. The next prime is 1252261721. The reversal of 1252261709 is 9071622521.

It is an interprime number because it is at equal distance from previous prime (1252261697) and next prime (1252261721).

It is not a de Polignac number, because 1252261709 - 2⁴ = 1252261693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252261739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1667084 + ... + 1667834.

It is an arithmetic number, because the mean of its divisors is an integer number (57302400).

Almost surely, 2^1252261709 is an apocalyptic number.

1252261709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1252261709 is a deficient number, since it is larger than the sum of its proper divisors (122995891).

1252261709 is a wasteful number, since it uses less digits than its factorization.

1252261709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1252261709 is about 35387.3099994899. The cubic root of 1252261709 is about 1077.8666474748.

The spelling of 1252261709 in words is "one billion, two hundred fifty-two million, two hundred sixty-one thousand, seven hundred nine".