1257448938 has 16 divisors (see below), whose sum is σ = 2515283616. Its totient is φ = 419085360.

The previous prime is 1257448931. The next prime is 1257448949. The reversal of 1257448938 is 8398447521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1257448931) 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 7 ways as a sum of consecutive naturals, for example, 43020 + ... + 66072.

It is an arithmetic number, because the mean of its divisors is an integer number (157205226).

Almost surely, 2^1257448938 is an apocalyptic number.

1257448938 is an abundant number, since it is smaller than the sum of its proper divisors (1257834678).

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

1257448938 is a wasteful number, since it uses less digits than its factorization.

1257448938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32149.

The product of its digits is 1935360, while the sum is 51.

The square root of 1257448938 is about 35460.5264766331. The cubic root of 1257448938 is about 1079.3528753587.

The spelling of 1257448938 in words is "one billion, two hundred fifty-seven million, four hundred forty-eight thousand, nine hundred thirty-eight".