1901051 has 4 divisors (see below), whose sum is σ = 1908192. Its totient is φ = 1893912.

The previous prime is 1901033. The next prime is 1901087. The reversal of 1901051 is 1501091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1501091 = 151 ⋅9941.

It is a cyclic number.

It is not a de Polignac number, because 1901051 - 2¹⁸ = 1638907 is a prime.

It is a super-2 number, since 2×1901051² = 7227989809202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1901021) 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, 3155 + ... + 3708.

It is an arithmetic number, because the mean of its divisors is an integer number (477048).

2^1901051 is an apocalyptic number.

1901051 is a deficient number, since it is larger than the sum of its proper divisors (7141).

1901051 is an equidigital number, since it uses as much as digits as its factorization.

1901051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 1901051 is about 1378.7860602719. The cubic root of 1901051 is about 123.8790661044.

The spelling of 1901051 in words is "one million, nine hundred one thousand, fifty-one".