140521534 has 8 divisors (see below), whose sum is σ = 211380480. Its totient is φ = 70061376.

The previous prime is 140521519. The next prime is 140521547. The reversal of 140521534 is 435125041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 140521499 and 140521508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98814 + ... + 100225.

It is an arithmetic number, because the mean of its divisors is an integer number (26422560).

Almost surely, 2^140521534 is an apocalyptic number.

140521534 is a deficient number, since it is larger than the sum of its proper divisors (70858946).

140521534 is a wasteful number, since it uses less digits than its factorization.

140521534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199394.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 140521534 is about 11854.1779132928. The cubic root of 140521534 is about 519.8933879068.

Adding to 140521534 its reverse (435125041), we get a palindrome (575646575).

The spelling of 140521534 in words is "one hundred forty million, five hundred twenty-one thousand, five hundred thirty-four".