421052516 has 6 divisors (see below), whose sum is σ = 736841910. Its totient is φ = 210526256.

The previous prime is 421052473. The next prime is 421052531. The reversal of 421052516 is 615250124.

It can be written as a sum of positive squares in only one way, i.e., 414529600 + 6522916 = 20360^2 + 2554^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52631561 + ... + 52631568.

It is an arithmetic number, because the mean of its divisors is an integer number (122806985).

Almost surely, 2^421052516 is an apocalyptic number.

It is an amenable number.

421052516 is a deficient number, since it is larger than the sum of its proper divisors (315789394).

421052516 is a wasteful number, since it uses less digits than its factorization.

421052516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105263133 (or 105263131 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 421052516 is about 20519.5642253923. The cubic root of 421052516 is about 749.5122849882.

The spelling of 421052516 in words is "four hundred twenty-one million, fifty-two thousand, five hundred sixteen".