71442253 has 8 divisors (see below), whose sum is σ = 72852408. Its totient is φ = 70043904.

The previous prime is 71442229. The next prime is 71442257. The reversal of 71442253 is 35224417.

It can be written as a sum of positive squares in 4 ways, for example, as 12659364 + 58782889 = 3558^2 + 7667^2 .

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 71442253 - 2¹³ = 71434061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71442257) 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, 9801 + ... + 15457.

It is an arithmetic number, because the mean of its divisors is an integer number (9106551).

Almost surely, 2^71442253 is an apocalyptic number.

71442253 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

71442253 is a deficient number, since it is larger than the sum of its proper divisors (1410155).

71442253 is a wasteful number, since it uses less digits than its factorization.

71442253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903.

The product of its digits is 6720, while the sum is 28.

The square root of 71442253 is about 8452.3519212110. The cubic root of 71442253 is about 414.9397560976.

It can be divided in two parts, 7 and 1442253, that multiplied together give a triangular number (10095771 = T₄₄₉₃).

The spelling of 71442253 in words is "seventy-one million, four hundred forty-two thousand, two hundred fifty-three".