1260257420 has 12 divisors (see below), whose sum is σ = 2646540624. Its totient is φ = 504102960.

The previous prime is 1260257393. The next prime is 1260257429. The reversal of 1260257420 is 247520621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1260257429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31506416 + ... + 31506455.

It is an arithmetic number, because the mean of its divisors is an integer number (220545052).

Almost surely, 2^1260257420 is an apocalyptic number.

1260257420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1260257420 is an abundant number, since it is smaller than the sum of its proper divisors (1386283204).

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

1260257420 is a wasteful number, since it uses less digits than its factorization.

1260257420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63012880 (or 63012878 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 1260257420 is about 35500.1045068884. The cubic root of 1260257420 is about 1080.1558474228.

The spelling of 1260257420 in words is "one billion, two hundred sixty million, two hundred fifty-seven thousand, four hundred twenty".