72051494 has 4 divisors (see below), whose sum is σ = 108077244. Its totient is φ = 36025746.

The previous prime is 72051493. The next prime is 72051509. The reversal of 72051494 is 49415027.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72051494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72051493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18012872 + ... + 18012875.

It is an arithmetic number, because the mean of its divisors is an integer number (27019311).

Almost surely, 2^72051494 is an apocalyptic number.

72051494 is a deficient number, since it is larger than the sum of its proper divisors (36025750).

72051494 is a wasteful number, since it uses less digits than its factorization.

72051494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36025749.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 72051494 is about 8488.3151449507. The cubic root of 72051494 is about 416.1159186023.

The spelling of 72051494 in words is "seventy-two million, fifty-one thousand, four hundred ninety-four".