1901142 has 12 divisors (see below), whose sum is σ = 4119180. Its totient is φ = 633708.

The previous prime is 1901131. The next prime is 1901147. The reversal of 1901142 is 2411091.

It is a super-2 number, since 2×1901142² = 7228681808328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 105619 = 1901142 / (1 + 9 + 0 + 1 + 1 + 4 + 2).

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 5 ways as a sum of consecutive naturals, for example, 52792 + ... + 52827.

It is an arithmetic number, because the mean of its divisors is an integer number (343265).

2^1901142 is an apocalyptic number.

1901142 is an abundant number, since it is smaller than the sum of its proper divisors (2218038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1901142 is a wasteful number, since it uses less digits than its factorization.

1901142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105627 (or 105624 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1901142 is about 1378.8190599205. The cubic root of 1901142 is about 123.8810426979.

The spelling of 1901142 in words is "one million, nine hundred one thousand, one hundred forty-two".