1251421150 has 48 divisors (see below), whose sum is σ = 2697684480. Its totient is φ = 423007200.

The previous prime is 1251421133. The next prime is 1251421163. The reversal of 1251421150 is 511241521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330 + ... + 50029.

It is an arithmetic number, because the mean of its divisors is an integer number (56201760).

Almost surely, 2^1251421150 is an apocalyptic number.

1251421150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251421150 is an abundant number, since it is smaller than the sum of its proper divisors (1446263330).

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

1251421150 is a wasteful number, since it uses less digits than its factorization.

1251421150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50449 (or 50444 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1251421150 is about 35375.4314461322. The cubic root of 1251421150 is about 1077.6254270507.

Adding to 1251421150 its reverse (511241521), we get a palindrome (1762662671).

The spelling of 1251421150 in words is "one billion, two hundred fifty-one million, four hundred twenty-one thousand, one hundred fifty".