1901149 has 4 divisors (see below), whose sum is σ = 1915164. Its totient is φ = 1887136.

The previous prime is 1901147. The next prime is 1901177. The reversal of 1901149 is 9411091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 562500 + 1338649 = 750^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1901149 - 2¹ = 1901147 is a prime.

It is a super-2 number, since 2×1901149² = 7228735040402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6802 + ... + 7075.

It is an arithmetic number, because the mean of its divisors is an integer number (478791).

2^1901149 is an apocalyptic number.

It is an amenable number.

1901149 is a deficient number, since it is larger than the sum of its proper divisors (14015).

1901149 is a wasteful number, since it uses less digits than its factorization.

1901149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14014.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1901149 is about 1378.8215983223. The cubic root of 1901149 is about 123.8811947410.

The spelling of 1901149 in words is "one million, nine hundred one thousand, one hundred forty-nine".