1256200470 has 48 divisors (see below), whose sum is σ = 3732711840. Its totient is φ = 287131392.

The previous prime is 1256200469. The next prime is 1256200471. The reversal of 1256200470 is 740026521.

It is an interprime number because it is at equal distance from previous prime (1256200469) and next prime (1256200471).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256200471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 996355 + ... + 997614.

It is an arithmetic number, because the mean of its divisors is an integer number (77764830).

Almost surely, 2^1256200470 is an apocalyptic number.

1256200470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256200470 is an abundant number, since it is smaller than the sum of its proper divisors (2476511370).

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

1256200470 is a wasteful number, since it uses less digits than its factorization.

1256200470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993989 (or 1993986 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1256200470 is about 35442.9184746403. The cubic root of 1256200470 is about 1078.9955424280.

Adding to 1256200470 its reverse (740026521), we get a palindrome (1996226991).

The spelling of 1256200470 in words is "one billion, two hundred fifty-six million, two hundred thousand, four hundred seventy".