1251412381 has 8 divisors (see below), whose sum is σ = 1328641920. Its totient is φ = 1174584768.

The previous prime is 1251412369. The next prime is 1251412391. The reversal of 1251412381 is 1832141521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1251412381 - 2¹¹ = 1251410333 is a prime.

It is a super-2 number, since 2×1251412381² = 3132065894640178322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251412391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94051 + ... + 106528.

It is an arithmetic number, because the mean of its divisors is an integer number (166080240).

Almost surely, 2^1251412381 is an apocalyptic number.

It is an amenable number.

1251412381 is a deficient number, since it is larger than the sum of its proper divisors (77229539).

1251412381 is a wasteful number, since it uses less digits than its factorization.

1251412381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200963.

The product of its digits is 1920, while the sum is 28.

The square root of 1251412381 is about 35375.3075039638. The cubic root of 1251412381 is about 1077.6229099873.

The spelling of 1251412381 in words is "one billion, two hundred fifty-one million, four hundred twelve thousand, three hundred eighty-one".