1421057501 has 2 divisors, whose sum is σ = 1421057502. Its totient is φ = 1421057500.

The previous prime is 1421057467. The next prime is 1421057543. The reversal of 1421057501 is 1057501241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 845297476 + 575760025 = 29074^2 + 23995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421057501 - 2⁶ = 1421057437 is a prime.

It is a super-2 number, since 2×1421057501² = 4038808842296730002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421056501) 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 as a sum of consecutive naturals, namely, 710528750 + 710528751.

It is an arithmetic number, because the mean of its divisors is an integer number (710528751).

Almost surely, 2^1421057501 is an apocalyptic number.

It is an amenable number.

1421057501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421057501 is an equidigital number, since it uses as much as digits as its factorization.

1421057501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 1421057501 is about 37696.9163327718. The cubic root of 1421057501 is about 1124.2698145021.

Adding to 1421057501 its reverse (1057501241), we get a palindrome (2478558742).

The spelling of 1421057501 in words is "one billion, four hundred twenty-one million, fifty-seven thousand, five hundred one".