71002154 has 4 divisors (see below), whose sum is σ = 106503234. Its totient is φ = 35501076.

The previous prime is 71002147. The next prime is 71002199. The reversal of 71002154 is 45120017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45120017 = 263 ⋅171559.

It can be written as a sum of positive squares in only one way, i.e., 70946929 + 55225 = 8423^2 + 235^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17750537 + ... + 17750540.

Almost surely, 2^71002154 is an apocalyptic number.

71002154 is a deficient number, since it is larger than the sum of its proper divisors (35501080).

71002154 is a wasteful number, since it uses less digits than its factorization.

71002154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35501079.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 71002154 is about 8426.2775885915. The cubic root of 71002154 is about 414.0859623748.

The spelling of 71002154 in words is "seventy-one million, two thousand, one hundred fifty-four".