51429742 has 24 divisors (see below), whose sum is σ = 95473296. Its totient is φ = 20344896.

The previous prime is 51429737. The next prime is 51429761. The reversal of 51429742 is 24792415.

It is a junction number, because it is equal to n+sod(n) for n = 51429698 and 51429707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8503 + ... + 13234.

It is an arithmetic number, because the mean of its divisors is an integer number (3978054).

Almost surely, 2^51429742 is an apocalyptic number.

51429742 is a deficient number, since it is larger than the sum of its proper divisors (44043554).

51429742 is a wasteful number, since it uses less digits than its factorization.

51429742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21772 (or 21759 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 51429742 is about 7171.4532697355. The cubic root of 51429742 is about 371.8816779819.

It can be divided in two parts, 5142 and 9742, that added together give a square (14884 = 122²).

The spelling of 51429742 in words is "fifty-one million, four hundred twenty-nine thousand, seven hundred forty-two".