1225257087 has 4 divisors (see below), whose sum is σ = 1633676120. Its totient is φ = 816838056.

The previous prime is 1225257083. The next prime is 1225257091. The reversal of 1225257087 is 7807525221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1225257083) and next prime (1225257091).

It is not a de Polignac number, because 1225257087 - 2² = 1225257083 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 (1225257083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204209512 + ... + 204209517.

It is an arithmetic number, because the mean of its divisors is an integer number (408419030).

Almost surely, 2^1225257087 is an apocalyptic number.

1225257087 is a deficient number, since it is larger than the sum of its proper divisors (408419033).

1225257087 is an equidigital number, since it uses as much as digits as its factorization.

1225257087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408419032.

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 1225257087 is about 35003.6724787557. The cubic root of 1225257087 is about 1070.0623269951.

The spelling of 1225257087 in words is "one billion, two hundred twenty-five million, two hundred fifty-seven thousand, eighty-seven".