1253261087 has 8 divisors (see below), whose sum is σ = 1393203840. Its totient is φ = 1119538080.

The previous prime is 1253261069. The next prime is 1253261089. The reversal of 1253261087 is 7801623521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253261087 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 (1253261089) 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 7 ways as a sum of consecutive naturals, for example, 1554512 + ... + 1555317.

It is an arithmetic number, because the mean of its divisors is an integer number (174150480).

Almost surely, 2^1253261087 is an apocalyptic number.

1253261087 is a deficient number, since it is larger than the sum of its proper divisors (139942753).

1253261087 is a wasteful number, since it uses less digits than its factorization.

1253261087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109873.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1253261087 is about 35401.4277536938. The cubic root of 1253261087 is about 1078.1533047496.

The spelling of 1253261087 in words is "one billion, two hundred fifty-three million, two hundred sixty-one thousand, eighty-seven".