1257520472 has 64 divisors (see below), whose sum is σ = 2694451200. Its totient is φ = 545408640.

The previous prime is 1257520463. The next prime is 1257520489. The reversal of 1257520472 is 2740257521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248447 + ... + 253457.

It is an arithmetic number, because the mean of its divisors is an integer number (42100800).

Almost surely, 2^1257520472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257520472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347225600).

1257520472 is an abundant number, since it is smaller than the sum of its proper divisors (1436930728).

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

1257520472 is a wasteful number, since it uses less digits than its factorization.

1257520472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 1257520472 is about 35461.5351049556. The cubic root of 1257520472 is about 1079.3733424494.

Adding to 1257520472 its reverse (2740257521), we get a palindrome (3997777993).

The spelling of 1257520472 in words is "one billion, two hundred fifty-seven million, five hundred twenty thousand, four hundred seventy-two".