1542390 has 16 divisors (see below), whose sum is σ = 3701808. Its totient is φ = 411296.

The previous prime is 1542383. The next prime is 1542421. The reversal of 1542390 is 932451.

1542390 = T₂₃₉ + T₂₄₀ + ... + T₂₈₃.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25677 + ... + 25736.

It is an arithmetic number, because the mean of its divisors is an integer number (231363).

2^1542390 is an apocalyptic number.

1542390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1542390 is an abundant number, since it is smaller than the sum of its proper divisors (2159418).

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

1542390 is a wasteful number, since it uses less digits than its factorization.

1542390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51423.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1542390 is about 1241.9299497154. The cubic root of 1542390 is about 115.5397438233.

The spelling of 1542390 in words is "one million, five hundred forty-two thousand, three hundred ninety".