1540143452 has 12 divisors (see below), whose sum is σ = 2696222256. Its totient is φ = 769794240.

The previous prime is 1540143443. The next prime is 1540143481. The reversal of 1540143452 is 2543410451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56624 + ... + 79287.

It is an arithmetic number, because the mean of its divisors is an integer number (224685188).

Almost surely, 2^1540143452 is an apocalyptic number.

It is an amenable number.

1540143452 is a deficient number, since it is larger than the sum of its proper divisors (1156078804).

1540143452 is a wasteful number, since it uses less digits than its factorization.

1540143452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138748 (or 138746 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1540143452 is about 39244.6614458578. The cubic root of 1540143452 is about 1154.8362059791.

The spelling of 1540143452 in words is "one billion, five hundred forty million, one hundred forty-three thousand, four hundred fifty-two".