71415450 has 72 divisors (see below), whose sum is σ = 193323936. Its totient is φ = 18900000.

The previous prime is 71415431. The next prime is 71415479. The reversal of 71415450 is 5451417.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 67425 + ... + 68475.

Almost surely, 2^71415450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71415450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96661968).

71415450 is an abundant number, since it is smaller than the sum of its proper divisors (121908486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71415450 is a wasteful number, since it uses less digits than its factorization.

71415450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 71415450 is about 8450.7662374485. The cubic root of 71415450 is about 414.8878586049.

Adding to 71415450 its reverse (5451417), we get a palindrome (76866867).

The spelling of 71415450 in words is "seventy-one million, four hundred fifteen thousand, four hundred fifty".