1267689425 has 6 divisors (see below), whose sum is σ = 1571934918. Its totient is φ = 1014151520.

The previous prime is 1267689421. The next prime is 1267689463. The reversal of 1267689425 is 5249867621.

It can be written as a sum of positive squares in 3 ways, for example, as 76335169 + 1191354256 = 8737^2 + 34516^2 .

It is not a de Polignac number, because 1267689425 - 2² = 1267689421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1267689421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25353764 + ... + 25353813.

It is an arithmetic number, because the mean of its divisors is an integer number (261989153).

Almost surely, 2^1267689425 is an apocalyptic number.

It is an amenable number.

1267689425 is a deficient number, since it is larger than the sum of its proper divisors (304245493).

1267689425 is an equidigital number, since it uses as much as digits as its factorization.

1267689425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50707587 (or 50707582 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 1267689425 is about 35604.6264549988. The cubic root of 1267689425 is about 1082.2749898122.

The spelling of 1267689425 in words is "one billion, two hundred sixty-seven million, six hundred eighty-nine thousand, four hundred twenty-five".