1256200490 has 16 divisors (see below), whose sum is σ = 2309271552. Its totient is φ = 491788944.

The previous prime is 1256200471. The next prime is 1256200513. The reversal of 1256200490 is 940026521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1335914 + ... + 1336853.

It is an arithmetic number, because the mean of its divisors is an integer number (144329472).

Almost surely, 2^1256200490 is an apocalyptic number.

1256200490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256200490 is a deficient number, since it is larger than the sum of its proper divisors (1053071062).

1256200490 is a wasteful number, since it uses less digits than its factorization.

1256200490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672821.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1256200490 is about 35442.9187567841. The cubic root of 1256200490 is about 1078.9955481542.

The spelling of 1256200490 in words is "one billion, two hundred fifty-six million, two hundred thousand, four hundred ninety".