1540100142 has 80 divisors (see below), whose sum is σ = 4176010080. Its totient is φ = 414139392.

The previous prime is 1540100141. The next prime is 1540100143. The reversal of 1540100142 is 2410010451.

It is an interprime number because it is at equal distance from previous prime (1540100141) and next prime (1540100143).

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 (1540100141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20667 + ... + 59222.

It is an arithmetic number, because the mean of its divisors is an integer number (52200126).

Almost surely, 2^1540100142 is an apocalyptic number.

1540100142 is an abundant number, since it is smaller than the sum of its proper divisors (2635909938).

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

1540100142 is a wasteful number, since it uses less digits than its factorization.

1540100142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79927 (or 79918 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1540100142 is about 39244.1096471814. The cubic root of 1540100142 is about 1154.8253809214.

Adding to 1540100142 its reverse (2410010451), we get a palindrome (3950110593).

The spelling of 1540100142 in words is "one billion, five hundred forty million, one hundred thousand, one hundred forty-two".