1573661742 has 32 divisors (see below), whose sum is σ = 3360890880. Its totient is φ = 490126560.

The previous prime is 1573661741. The next prime is 1573661779. The reversal of 1573661742 is 2471663751.

It is a happy number.

It is a super-2 number, since 2×1573661742² = 4952822556468949128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1573661694 and 1573661703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1573661741) 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, 140478 + ... + 151265.

It is an arithmetic number, because the mean of its divisors is an integer number (105027840).

Almost surely, 2^1573661742 is an apocalyptic number.

1573661742 is an abundant number, since it is smaller than the sum of its proper divisors (1787229138).

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

1573661742 is a wasteful number, since it uses less digits than its factorization.

1573661742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291808.

The product of its digits is 211680, while the sum is 42.

The square root of 1573661742 is about 39669.4056169235. The cubic root of 1573661742 is about 1163.1537598720.

The spelling of 1573661742 in words is "one billion, five hundred seventy-three million, six hundred sixty-one thousand, seven hundred forty-two".