11900142 has 16 divisors (see below), whose sum is σ = 26444880. Its totient is φ = 3966696.

The previous prime is 11900107. The next prime is 11900149. The reversal of 11900142 is 24100911.

It is a super-2 number, since 2×11900142² = 283226759240328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11900149) 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, 110133 + ... + 110240.

It is an arithmetic number, because the mean of its divisors is an integer number (1652805).

Almost surely, 2^11900142 is an apocalyptic number.

11900142 is an abundant number, since it is smaller than the sum of its proper divisors (14544738).

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

11900142 is a wasteful number, since it uses less digits than its factorization.

11900142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220384 (or 220378 counting only the distinct ones).

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

The square root of 11900142 is about 3449.6582439424. The cubic root of 11900142 is about 228.3060294960.

The spelling of 11900142 in words is "eleven million, nine hundred thousand, one hundred forty-two".