1542740407 has 4 divisors (see below), whose sum is σ = 1661412760. Its totient is φ = 1424068056.

The previous prime is 1542740401. The next prime is 1542740411. The reversal of 1542740407 is 7040472451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7040472451 = 10657 ⋅660643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542740407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542740401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59336157 + ... + 59336182.

It is an arithmetic number, because the mean of its divisors is an integer number (415353190).

Almost surely, 2^1542740407 is an apocalyptic number.

1542740407 is a deficient number, since it is larger than the sum of its proper divisors (118672353).

1542740407 is a wasteful number, since it uses less digits than its factorization.

1542740407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118672352.

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 1542740407 is about 39277.7342396427. The cubic root of 1542740407 is about 1155.4849277123.

The spelling of 1542740407 in words is "one billion, five hundred forty-two million, seven hundred forty thousand, four hundred seven".