1540494 has 36 divisors (see below), whose sum is σ = 3540888. Its totient is φ = 483120.

The previous prime is 1540481. The next prime is 1540499. The reversal of 1540494 is 4940451.

1540494 = T₁₁₂ + T₁₁₃ + ... + T₂₁₉.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540499) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25224 + ... + 25284.

It is an arithmetic number, because the mean of its divisors is an integer number (98358).

2^1540494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1770444).

1540494 is an abundant number, since it is smaller than the sum of its proper divisors (2000394).

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

1540494 is a wasteful number, since it uses less digits than its factorization.

1540494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1540494 is about 1241.1663869119. The cubic root of 1540494 is about 115.4923815743.

The spelling of 1540494 in words is "one million, five hundred forty thousand, four hundred ninety-four".