1531499742 has 12 divisors (see below), whose sum is σ = 3318249480. Its totient is φ = 510499908.

The previous prime is 1531499741. The next prime is 1531499803. The reversal of 1531499742 is 2479941351.

1531499742 is a `hidden beast` number, since 1 + 531 + 49 + 9 + 74 + 2 = 666.

It is a Smith number, since the sum of its digits (45) 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 (1531499741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42541642 + ... + 42541677.

It is an arithmetic number, because the mean of its divisors is an integer number (276520790).

Almost surely, 2^1531499742 is an apocalyptic number.

1531499742 is an abundant number, since it is smaller than the sum of its proper divisors (1786749738).

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

1531499742 is a wasteful number, since it uses less digits than its factorization.

1531499742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85083327 (or 85083324 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1531499742 is about 39134.3805623649. The cubic root of 1531499742 is about 1152.6717318983.

The spelling of 1531499742 in words is "one billion, five hundred thirty-one million, four hundred ninety-nine thousand, seven hundred forty-two".