1257468378 has 16 divisors (see below), whose sum is σ = 2519363520. Its totient is φ = 418418336.

The previous prime is 1257468371. The next prime is 1257468383. The reversal of 1257468378 is 8738647521.

It is a self number, because there is not a number n which added to its sum of digits gives 1257468378.

It is not an unprimeable number, because it can be changed into a prime (1257468371) 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, 180750 + ... + 187577.

It is an arithmetic number, because the mean of its divisors is an integer number (157460220).

Almost surely, 2^1257468378 is an apocalyptic number.

1257468378 is an abundant number, since it is smaller than the sum of its proper divisors (1261895142).

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

1257468378 is a wasteful number, since it uses less digits than its factorization.

1257468378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368901.

The product of its digits is 2257920, while the sum is 51.

The square root of 1257468378 is about 35460.8005831792. The cubic root of 1257468378 is about 1079.3584375493.

The spelling of 1257468378 in words is "one billion, two hundred fifty-seven million, four hundred sixty-eight thousand, three hundred seventy-eight".