1901567 has 2 divisors, whose sum is σ = 1901568. Its totient is φ = 1901566.

The previous prime is 1901563. The next prime is 1901597. The reversal of 1901567 is 7651091.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1901567 - 2² = 1901563 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1901563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950783 + 950784.

It is an arithmetic number, because the mean of its divisors is an integer number (950784).

2^1901567 is an apocalyptic number.

1901567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901567 is an equidigital number, since it uses as much as digits as its factorization.

1901567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1901567 is about 1378.9731687020. The cubic root of 1901567 is about 123.8902732061.

The spelling of 1901567 in words is "one million, nine hundred one thousand, five hundred sixty-seven".