1257001248 has 48 divisors (see below), whose sum is σ = 3304113120. Its totient is φ = 418430976.

The previous prime is 1257001243. The next prime is 1257001261. The reversal of 1257001248 is 8421007521.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1257001243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65311 + ... + 82337.

It is an arithmetic number, because the mean of its divisors is an integer number (68835690).

Almost surely, 2^1257001248 is an apocalyptic number.

It is an amenable number.

1257001248 is an abundant number, since it is smaller than the sum of its proper divisors (2047111872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257001248 is a wasteful number, since it uses less digits than its factorization.

1257001248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17809 (or 17801 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1257001248 is about 35454.2134026409. The cubic root of 1257001248 is about 1079.2247660224.

Adding to 1257001248 its reverse (8421007521), we get a palindrome (9678008769).

The spelling of 1257001248 in words is "one billion, two hundred fifty-seven million, one thousand, two hundred forty-eight".