71503742 has 4 divisors (see below), whose sum is σ = 107255616. Its totient is φ = 35751870.

The previous prime is 71503741. The next prime is 71503813. The reversal of 71503742 is 24730517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24730517 = 7 ⋅3532931.

It is a super-2 number, since 2×71503742² = 10225570240005128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71503741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17875934 + ... + 17875937.

It is an arithmetic number, because the mean of its divisors is an integer number (26813904).

Almost surely, 2^71503742 is an apocalyptic number.

71503742 is a deficient number, since it is larger than the sum of its proper divisors (35751874).

71503742 is a wasteful number, since it uses less digits than its factorization.

71503742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35751873.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 71503742 is about 8455.9885288475. The cubic root of 71503742 is about 415.0587655689.

The spelling of 71503742 in words is "seventy-one million, five hundred three thousand, seven hundred forty-two".