251874742 has 8 divisors (see below), whose sum is σ = 431785296. Its totient is φ = 107946312.

The previous prime is 251874731. The next prime is 251874743. The reversal of 251874742 is 247478152.

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

It is a junction number, because it is equal to n+sod(n) for n = 251874695 and 251874704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251874743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8995513 + ... + 8995540.

It is an arithmetic number, because the mean of its divisors is an integer number (53973162).

Almost surely, 2^251874742 is an apocalyptic number.

251874742 is a deficient number, since it is larger than the sum of its proper divisors (179910554).

251874742 is a wasteful number, since it uses less digits than its factorization.

251874742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17991062.

The product of its digits is 125440, while the sum is 40.

The square root of 251874742 is about 15870.5621198494. The cubic root of 251874742 is about 631.5312897005.

It can be divided in two parts, 25187 and 4742, that added together give a square (29929 = 173²).

The spelling of 251874742 in words is "two hundred fifty-one million, eight hundred seventy-four thousand, seven hundred forty-two".