251401342 has 8 divisors (see below), whose sum is σ = 382268016. Its totient is φ = 123978672.

The previous prime is 251401333. The next prime is 251401357. The reversal of 251401342 is 243104152.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860818 + ... + 861109.

It is an arithmetic number, because the mean of its divisors is an integer number (47783502).

Almost surely, 2^251401342 is an apocalyptic number.

251401342 is a deficient number, since it is larger than the sum of its proper divisors (130866674).

251401342 is a wasteful number, since it uses less digits than its factorization.

251401342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722002.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 251401342 is about 15855.6406997636. The cubic root of 251401342 is about 631.1353860206.

Adding to 251401342 its reverse (243104152), we get a palindrome (494505494).

The spelling of 251401342 in words is "two hundred fifty-one million, four hundred one thousand, three hundred forty-two".