1940551 has 2 divisors, whose sum is σ = 1940552. Its totient is φ = 1940550.

The previous prime is 1940537. The next prime is 1940557. The reversal of 1940551 is 1550491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1940551 - 2⁷ = 1940423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970275 + 970276.

It is an arithmetic number, because the mean of its divisors is an integer number (970276).

2^1940551 is an apocalyptic number.

1940551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940551 is an equidigital number, since it uses as much as digits as its factorization.

1940551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1940551 is about 1393.0366111485. The cubic root of 1940551 is about 124.7311769545.

The spelling of 1940551 in words is "one million, nine hundred forty thousand, five hundred fifty-one".