1542990 has 32 divisors (see below), whose sum is σ = 3899520. Its totient is φ = 389664.

The previous prime is 1542973. The next prime is 1542991. The reversal of 1542990 is 992451.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784 + ... + 1923.

It is an arithmetic number, because the mean of its divisors is an integer number (121860).

2^1542990 is an apocalyptic number.

1542990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1542990 is an abundant number, since it is smaller than the sum of its proper divisors (2356530).

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

1542990 is a wasteful number, since it uses less digits than its factorization.

1542990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1542990 is about 1242.1714857458. The cubic root of 1542990 is about 115.5547237914.

The spelling of 1542990 in words is "one million, five hundred forty-two thousand, nine hundred ninety".