1901457 has 12 divisors (see below), whose sum is σ = 2814084. Its totient is φ = 1236480.

The previous prime is 1901437. The next prime is 1901461. The reversal of 1901457 is 7541091.

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 1347921 = 744^2 + 1161^2 .

It is not a de Polignac number, because 1901457 - 2⁷ = 1901329 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1901457.

It is not an unprimeable number, because it can be changed into a prime (1901407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2208 + ... + 2945.

It is an arithmetic number, because the mean of its divisors is an integer number (234507).

2^1901457 is an apocalyptic number.

It is an amenable number.

1901457 is a deficient number, since it is larger than the sum of its proper divisors (912627).

1901457 is a wasteful number, since it uses less digits than its factorization.

1901457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200 (or 5197 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1901457 is about 1378.9332833752. The cubic root of 1901457 is about 123.8878842654.

The spelling of 1901457 in words is "one million, nine hundred one thousand, four hundred fifty-seven".