1420524021 has 16 divisors (see below), whose sum is σ = 2165155328. Its totient is φ = 811522800.

The previous prime is 1420524011. The next prime is 1420524031. The reversal of 1420524021 is 1204250241.

It is an interprime number because it is at equal distance from previous prime (1420524011) and next prime (1420524031).

It is not a de Polignac number, because 1420524021 - 2⁵ = 1420523989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420524011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124986 + ... + 135876.

It is an arithmetic number, because the mean of its divisors is an integer number (135322208).

Almost surely, 2^1420524021 is an apocalyptic number.

It is an amenable number.

1420524021 is a deficient number, since it is larger than the sum of its proper divisors (744631307).

1420524021 is a wasteful number, since it uses less digits than its factorization.

1420524021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17112.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1420524021 is about 37689.8397582160. The cubic root of 1420524021 is about 1124.1291093043.

Adding to 1420524021 its reverse (1204250241), we get a palindrome (2624774262).

It can be divided in two parts, 14205 and 24021, that added together give a triangular number (38226 = T₂₇₆).

The spelling of 1420524021 in words is "one billion, four hundred twenty million, five hundred twenty-four thousand, twenty-one".