421532534 has 4 divisors (see below), whose sum is σ = 632298804. Its totient is φ = 210766266.

The previous prime is 421532533. The next prime is 421532557. The reversal of 421532534 is 435235124.

It is a happy number.

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

It is a super-2 number, since 2×421532534² = 355379354440922312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421532497 and 421532506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421532533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105383132 + ... + 105383135.

It is an arithmetic number, because the mean of its divisors is an integer number (158074701).

Almost surely, 2^421532534 is an apocalyptic number.

421532534 is a deficient number, since it is larger than the sum of its proper divisors (210766270).

421532534 is a wasteful number, since it uses less digits than its factorization.

421532534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210766269.

The product of its digits is 14400, while the sum is 29.

The square root of 421532534 is about 20531.2574870610. The cubic root of 421532534 is about 749.7970022460.

Adding to 421532534 its reverse (435235124), we get a palindrome (856767658).

The spelling of 421532534 in words is "four hundred twenty-one million, five hundred thirty-two thousand, five hundred thirty-four".