1421662531 has 2 divisors, whose sum is σ = 1421662532. Its totient is φ = 1421662530.

The previous prime is 1421662423. The next prime is 1421662537. The reversal of 1421662531 is 1352661241.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1352661241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421662531 - 2¹⁵ = 1421629763 is a prime.

It is a super-2 number, since 2×1421662531² = 4042248704098651922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1421662493 and 1421662502.

It is not a weakly prime, because it can be changed into another prime (1421662537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710831265 + 710831266.

It is an arithmetic number, because the mean of its divisors is an integer number (710831266).

Almost surely, 2^1421662531 is an apocalyptic number.

1421662531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421662531 is an equidigital number, since it uses as much as digits as its factorization.

1421662531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 1421662531 is about 37704.9404057346. The cubic root of 1421662531 is about 1124.4293483825.

The spelling of 1421662531 in words is "one billion, four hundred twenty-one million, six hundred sixty-two thousand, five hundred thirty-one".