1901429 has 2 divisors, whose sum is σ = 1901430. Its totient is φ = 1901428.

The previous prime is 1901413. The next prime is 1901437. The reversal of 1901429 is 9241091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1620529 + 280900 = 1273^2 + 530^2 .

It is an emirp because it is prime and its reverse (9241091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1901429 - 2⁴ = 1901413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1901398 and 1901407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1901489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950714 + 950715.

It is an arithmetic number, because the mean of its divisors is an integer number (950715).

2^1901429 is an apocalyptic number.

It is an amenable number.

1901429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901429 is an equidigital number, since it uses as much as digits as its factorization.

1901429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1901429 is about 1378.9231305624. The cubic root of 1901429 is about 123.8872761566.

The spelling of 1901429 in words is "one million, nine hundred one thousand, four hundred twenty-nine".