1256216150 has 24 divisors (see below), whose sum is σ = 2670357360. Its totient is φ = 430702560.

The previous prime is 1256216149. The next prime is 1256216153. The reversal of 1256216150 is 516126521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256216153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1794245 + ... + 1794944.

It is an arithmetic number, because the mean of its divisors is an integer number (111264890).

Almost surely, 2^1256216150 is an apocalyptic number.

1256216150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256216150 is an abundant number, since it is smaller than the sum of its proper divisors (1414141210).

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

1256216150 is a wasteful number, since it uses less digits than its factorization.

1256216150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589208 (or 3589203 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1256216150 is about 35443.1396746959. The cubic root of 1256216150 is about 1079.0000317804. Note that the first 4 decimals are identical.

The spelling of 1256216150 in words is "one billion, two hundred fifty-six million, two hundred sixteen thousand, one hundred fifty".