70521494 has 4 divisors (see below), whose sum is σ = 105782244. Its totient is φ = 35260746.

The previous prime is 70521481. The next prime is 70521509. The reversal of 70521494 is 49412507.

It is a happy number.

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

It is a super-2 number, since 2×70521494² = 9946562231984072, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 70521494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17630372 + ... + 17630375.

It is an arithmetic number, because the mean of its divisors is an integer number (26445561).

Almost surely, 2^70521494 is an apocalyptic number.

70521494 is a deficient number, since it is larger than the sum of its proper divisors (35260750).

70521494 is a wasteful number, since it uses less digits than its factorization.

70521494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35260749.

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

The square root of 70521494 is about 8397.7076634043. The cubic root of 70521494 is about 413.1494396736.

The spelling of 70521494 in words is "seventy million, five hundred twenty-one thousand, four hundred ninety-four".