1257660148 has 12 divisors (see below), whose sum is σ = 2296596960. Its totient is φ = 601489592.

The previous prime is 1257660121. The next prime is 1257660211. The reversal of 1257660148 is 8410667521.

It is a self number, because there is not a number n which added to its sum of digits gives 1257660148.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6835018 + ... + 6835201.

It is an arithmetic number, because the mean of its divisors is an integer number (191383080).

Almost surely, 2^1257660148 is an apocalyptic number.

It is an amenable number.

1257660148 is a deficient number, since it is larger than the sum of its proper divisors (1038936812).

1257660148 is a wasteful number, since it uses less digits than its factorization.

1257660148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13670246 (or 13670244 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1257660148 is about 35463.5044517600. The cubic root of 1257660148 is about 1079.4133038849.

The spelling of 1257660148 in words is "one billion, two hundred fifty-seven million, six hundred sixty thousand, one hundred forty-eight".