1401283921 has 2 divisors, whose sum is σ = 1401283922. Its totient is φ = 1401283920.

The previous prime is 1401283879. The next prime is 1401283967. The reversal of 1401283921 is 1293821041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144130625 + 257153296 = 33825^2 + 16036^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401283921 - 2²¹ = 1399186769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1401283981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700641960 + 700641961.

It is an arithmetic number, because the mean of its divisors is an integer number (700641961).

Almost surely, 2^1401283921 is an apocalyptic number.

It is an amenable number.

1401283921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401283921 is an equidigital number, since it uses as much as digits as its factorization.

1401283921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1401283921 is about 37433.7270519514. The cubic root of 1401283921 is about 1119.0308157423.

The spelling of 1401283921 in words is "one billion, four hundred one million, two hundred eighty-three thousand, nine hundred twenty-one".