1901225 has 12 divisors (see below), whose sum is σ = 2381916. Its totient is φ = 1505280.

The previous prime is 1901219. The next prime is 1901231. The reversal of 1901225 is 5221091.

It is an interprime number because it is at equal distance from previous prime (1901219) and next prime (1901231).

It can be written as a sum of positive squares in 6 ways, for example, as 529984 + 1371241 = 728^2 + 1171^2 .

It is not a de Polignac number, because 1901225 - 2⁴ = 1901209 is a prime.

It is a super-2 number, since 2×1901225² = 7229313001250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1901197 and 1901206.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2489 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (198493).

2^1901225 is an apocalyptic number.

It is an amenable number.

1901225 is a deficient number, since it is larger than the sum of its proper divisors (480691).

1901225 is a wasteful number, since it uses less digits than its factorization.

1901225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1901225 is about 1378.8491578124. The cubic root of 1901225 is about 123.8828454700.

The spelling of 1901225 in words is "one million, nine hundred one thousand, two hundred twenty-five".