1901139 has 8 divisors (see below), whose sum is σ = 2569872. Its totient is φ = 1249920.

The previous prime is 1901131. The next prime is 1901147. The reversal of 1901139 is 9311091.

It is an interprime number because it is at equal distance from previous prime (1901131) and next prime (1901147).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1901139 - 2³ = 1901131 is a prime.

It is a super-2 number, since 2×1901139² = 7228658994642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1901131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4122 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (321234).

2^1901139 is an apocalyptic number.

1901139 is a deficient number, since it is larger than the sum of its proper divisors (668733).

1901139 is an equidigital number, since it uses as much as digits as its factorization.

1901139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8757.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 1901139 is about 1378.8179720326. The cubic root of 1901139 is about 123.8809775365.

The spelling of 1901139 in words is "one million, nine hundred one thousand, one hundred thirty-nine".