142009494 has 16 divisors (see below), whose sum is σ = 309839040. Its totient is φ = 43033160.

The previous prime is 142009493. The next prime is 142009501. The reversal of 142009494 is 494900241.

142009494 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×142009494² = 40333392772272072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142009493) 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, 1075764 + ... + 1075895.

It is an arithmetic number, because the mean of its divisors is an integer number (19364940).

Almost surely, 2^142009494 is an apocalyptic number.

142009494 is an abundant number, since it is smaller than the sum of its proper divisors (167829546).

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

142009494 is a wasteful number, since it uses less digits than its factorization.

142009494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151675.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 142009494 is about 11916.7736405455. The cubic root of 142009494 is about 521.7219714061.

The spelling of 142009494 in words is "one hundred forty-two million, nine thousand, four hundred ninety-four".