1578121260 has 48 divisors (see below), whose sum is σ = 4480987392. Its totient is φ = 414904000.

The previous prime is 1578121249. The next prime is 1578121267. The reversal of 1578121260 is 621218751.

It is a super-2 number, since 2×1578121260² = 4980933422527975200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1578121267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180966 + ... + 189485.

It is an arithmetic number, because the mean of its divisors is an integer number (93353904).

Almost surely, 2^1578121260 is an apocalyptic number.

1578121260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1578121260 is an abundant number, since it is smaller than the sum of its proper divisors (2902866132).

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

1578121260 is a wasteful number, since it uses less digits than its factorization.

1578121260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370534 (or 370532 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 1578121260 is about 39725.5743822541. The cubic root of 1578121260 is about 1164.2514572293.

The spelling of 1578121260 in words is "one billion, five hundred seventy-eight million, one hundred twenty-one thousand, two hundred sixty".